sys/bus/cam/cam_xpt.c

   1 /*
   2  * Implementation of the Common Access Method Transport (XPT) layer.
   3  *
   4  * Copyright (c) 1997, 1998, 1999 Justin T. Gibbs.
   5  * Copyright (c) 1997, 1998, 1999 Kenneth D. Merry.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions, and the following disclaimer,
  13  *    without modification, immediately at the beginning of the file.
  14  * 2. The name of the author may not be used to endorse or promote products
  15  *    derived from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
  21  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * $FreeBSD: src/sys/cam/cam_xpt.c,v 1.80.2.18 2002/12/09 17:31:55 gibbs Exp $
  30  * $DragonFly: src/sys/bus/cam/cam_xpt.c,v 1.14 2004/05/13 23:49:09 dillon Exp $
  31  */
  32 #include <sys/param.h>
  33 #include <sys/systm.h>
  34 #include <sys/types.h>
  35 #include <sys/malloc.h>
  36 #include <sys/kernel.h>
  37 #include <sys/time.h>
  38 #include <sys/conf.h>
  39 #include <sys/fcntl.h>
  40 #include <sys/md5.h>
  41 #include <sys/devicestat.h>
  42 #include <sys/interrupt.h>
  43 #include <sys/bus.h>
  44 #include <sys/thread.h>
  45 #include <sys/thread2.h>
  46
  47 #ifdef PC98
  48 #include <pc98/pc98/pc98_machdep.h>     /* geometry translation */
  49 #endif
  50
  51 #include <machine/clock.h>
  52 #include <machine/ipl.h>
  53
  54 #include "cam.h"
  55 #include "cam_ccb.h"
  56 #include "cam_periph.h"
  57 #include "cam_sim.h"
  58 #include "cam_xpt.h"
  59 #include "cam_xpt_sim.h"
  60 #include "cam_xpt_periph.h"
  61 #include "cam_debug.h"
  62
  63 #include "scsi/scsi_all.h"
  64 #include "scsi/scsi_message.h"
  65 #include "scsi/scsi_pass.h"
  66 #include "opt_cam.h"
  67
  68 /* Datastructures internal to the xpt layer */
  69
  70 /*
  71  * Definition of an async handler callback block.  These are used to add
  72  * SIMs and peripherals to the async callback lists.
  73  */
  74 struct async_node {
  75         SLIST_ENTRY(async_node) links;
  76         u_int32_t       event_enable;   /* Async Event enables */
  77         void            (*callback)(void *arg, u_int32_t code,
  78                                     struct cam_path *path, void *args);
  79         void            *callback_arg;
  80 };
  81
  82 SLIST_HEAD(async_list, async_node);
  83 SLIST_HEAD(periph_list, cam_periph);
  84 static STAILQ_HEAD(highpowerlist, ccb_hdr) highpowerq;
  85
  86 /*
  87  * This is the maximum number of high powered commands (e.g. start unit)
  88  * that can be outstanding at a particular time.
  89  */
  90 #ifndef CAM_MAX_HIGHPOWER
  91 #define CAM_MAX_HIGHPOWER  4
  92 #endif
  93
  94 /* number of high powered commands that can go through right now */
  95 static int num_highpower = CAM_MAX_HIGHPOWER;
  96
  97 /*
  98  * Structure for queueing a device in a run queue.
  99  * There is one run queue for allocating new ccbs,
 100  * and another for sending ccbs to the controller.
 101  */
 102 struct cam_ed_qinfo {
 103         cam_pinfo pinfo;
 104         struct    cam_ed *device;
 105 };
 106
 107 /*
 108  * The CAM EDT (Existing Device Table) contains the device information for
 109  * all devices for all busses in the system.  The table contains a
 110  * cam_ed structure for each device on the bus.
 111  */
 112 struct cam_ed {
 113         TAILQ_ENTRY(cam_ed) links;
 114         struct  cam_ed_qinfo alloc_ccb_entry;
 115         struct  cam_ed_qinfo send_ccb_entry;
 116         struct  cam_et   *target;
 117         lun_id_t         lun_id;
 118         struct  camq drvq;              /*
 119                                          * Queue of type drivers wanting to do
 120                                          * work on this device.
 121                                          */
 122         struct  cam_ccbq ccbq;          /* Queue of pending ccbs */
 123         struct  async_list asyncs;      /* Async callback info for this B/T/L */
 124         struct  periph_list periphs;    /* All attached devices */
 125         u_int   generation;             /* Generation number */
 126         struct  cam_periph *owner;      /* Peripheral driver's ownership tag */
 127         struct  xpt_quirk_entry *quirk; /* Oddities about this device */
 128                                         /* Storage for the inquiry data */
 129         struct  scsi_inquiry_data inq_data;
 130         u_int8_t         inq_flags;     /*
 131                                          * Current settings for inquiry flags.
 132                                          * This allows us to override settings
 133                                          * like disconnection and tagged
 134                                          * queuing for a device.
 135                                          */
 136         u_int8_t         queue_flags;   /* Queue flags from the control page */
 137         u_int8_t         serial_num_len;
 138         u_int8_t         *serial_num;
 139         u_int32_t        qfrozen_cnt;
 140         u_int32_t        flags;
 141 #define CAM_DEV_UNCONFIGURED            0x01
 142 #define CAM_DEV_REL_TIMEOUT_PENDING     0x02
 143 #define CAM_DEV_REL_ON_COMPLETE         0x04
 144 #define CAM_DEV_REL_ON_QUEUE_EMPTY      0x08
 145 #define CAM_DEV_RESIZE_QUEUE_NEEDED     0x10
 146 #define CAM_DEV_TAG_AFTER_COUNT         0x20
 147 #define CAM_DEV_INQUIRY_DATA_VALID      0x40
 148         u_int32_t        tag_delay_count;
 149 #define CAM_TAG_DELAY_COUNT             5
 150         u_int32_t        refcount;
 151         struct           callout_handle c_handle;
 152 };
 153
 154 /*
 155  * Each target is represented by an ET (Existing Target).  These
 156  * entries are created when a target is successfully probed with an
 157  * identify, and removed when a device fails to respond after a number
 158  * of retries, or a bus rescan finds the device missing.
 159  */
 160 struct cam_et {
 161         TAILQ_HEAD(, cam_ed) ed_entries;
 162         TAILQ_ENTRY(cam_et) links;
 163         struct  cam_eb  *bus;
 164         target_id_t     target_id;
 165         u_int32_t       refcount;
 166         u_int           generation;
 167         struct          timeval last_reset;     /* uptime of last reset */
 168 };
 169
 170 /*
 171  * Each bus is represented by an EB (Existing Bus).  These entries
 172  * are created by calls to xpt_bus_register and deleted by calls to
 173  * xpt_bus_deregister.
 174  */
 175 struct cam_eb {
 176         TAILQ_HEAD(, cam_et) et_entries;
 177         TAILQ_ENTRY(cam_eb)  links;
 178         path_id_t            path_id;
 179         struct cam_sim       *sim;
 180         struct timeval       last_reset;        /* uptime of last reset */
 181         u_int32_t            flags;
 182 #define CAM_EB_RUNQ_SCHEDULED   0x01
 183         u_int32_t            refcount;
 184         u_int                generation;
 185 };
 186
 187 struct cam_path {
 188         struct cam_periph *periph;
 189         struct cam_eb     *bus;
 190         struct cam_et     *target;
 191         struct cam_ed     *device;
 192 };
 193
 194 struct xpt_quirk_entry {
 195         struct scsi_inquiry_pattern inq_pat;
 196         u_int8_t quirks;
 197 #define CAM_QUIRK_NOLUNS        0x01
 198 #define CAM_QUIRK_NOSERIAL      0x02
 199 #define CAM_QUIRK_HILUNS        0x04
 200         u_int mintags;
 201         u_int maxtags;
 202 };
 203 #define CAM_SCSI2_MAXLUN        8
 204
 205 typedef enum {
 206         XPT_FLAG_OPEN           = 0x01
 207 } xpt_flags;
 208
 209 struct xpt_softc {
 210         xpt_flags       flags;
 211         u_int32_t       generation;
 212 };
 213
 214 static const char quantum[] = "QUANTUM";
 215 static const char sony[] = "SONY";
 216 static const char west_digital[] = "WDIGTL";
 217 static const char samsung[] = "SAMSUNG";
 218 static const char seagate[] = "SEAGATE";
 219 static const char microp[] = "MICROP";
 220
 221 static struct xpt_quirk_entry xpt_quirk_table[] =
 222 {
 223         {
 224                 /* Reports QUEUE FULL for temporary resource shortages */
 225                 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP39100*", "*" },
 226                 /*quirks*/0, /*mintags*/24, /*maxtags*/32
 227         },
 228         {
 229                 /* Reports QUEUE FULL for temporary resource shortages */
 230                 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP34550*", "*" },
 231                 /*quirks*/0, /*mintags*/24, /*maxtags*/32
 232         },
 233         {
 234                 /* Reports QUEUE FULL for temporary resource shortages */
 235                 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "XP32275*", "*" },
 236                 /*quirks*/0, /*mintags*/24, /*maxtags*/32
 237         },
 238         {
 239                 /* Broken tagged queuing drive */
 240                 { T_DIRECT, SIP_MEDIA_FIXED, microp, "4421-07*", "*" },
 241                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 242         },
 243         {
 244                 /* Broken tagged queuing drive */
 245                 { T_DIRECT, SIP_MEDIA_FIXED, "HP", "C372*", "*" },
 246                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 247         },
 248         {
 249                 /* Broken tagged queuing drive */
 250                 { T_DIRECT, SIP_MEDIA_FIXED, microp, "3391*", "x43h" },
 251                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 252         },
 253         {
 254                 /*
 255                  * Unfortunately, the Quantum Atlas III has the same
 256                  * problem as the Atlas II drives above.
 257                  * Reported by: "Johan Granlund" <johan@granlund.nu>
 258                  *
 259                  * For future reference, the drive with the problem was:
 260                  * QUANTUM QM39100TD-SW N1B0
 261                  *
 262                  * It's possible that Quantum will fix the problem in later
 263                  * firmware revisions.  If that happens, the quirk entry
 264                  * will need to be made specific to the firmware revisions
 265                  * with the problem.
 266                  *
 267                  */
 268                 /* Reports QUEUE FULL for temporary resource shortages */
 269                 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "QM39100*", "*" },
 270                 /*quirks*/0, /*mintags*/24, /*maxtags*/32
 271         },
 272         {
 273                 /*
 274                  * 18 Gig Atlas III, same problem as the 9G version.
 275                  * Reported by: Andre Albsmeier
 276                  *              <andre.albsmeier@mchp.siemens.de>
 277                  *
 278                  * For future reference, the drive with the problem was:
 279                  * QUANTUM QM318000TD-S N491
 280                  */
 281                 /* Reports QUEUE FULL for temporary resource shortages */
 282                 { T_DIRECT, SIP_MEDIA_FIXED, quantum, "QM318000*", "*" },
 283                 /*quirks*/0, /*mintags*/24, /*maxtags*/32
 284         },
 285         {
 286                 /*
 287                  * Broken tagged queuing drive
 288                  * Reported by: Bret Ford <bford@uop.cs.uop.edu>
 289                  *         and: Martin Renters <martin@tdc.on.ca>
 290                  */
 291                 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST410800*", "71*" },
 292                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 293         },
 294                 /*
 295                  * The Seagate Medalist Pro drives have very poor write
 296                  * performance with anything more than 2 tags.
 297                  *
 298                  * Reported by:  Paul van der Zwan <paulz@trantor.xs4all.nl>
 299                  * Drive:  <SEAGATE ST36530N 1444>
 300                  *
 301                  * Reported by:  Jeremy Lea <reg@shale.csir.co.za>
 302                  * Drive:  <SEAGATE ST34520W 1281>
 303                  *
 304                  * No one has actually reported that the 9G version
 305                  * (ST39140*) of the Medalist Pro has the same problem, but
 306                  * we're assuming that it does because the 4G and 6.5G
 307                  * versions of the drive are broken.
 308                  */
 309         {
 310                 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST34520*", "*"},
 311                 /*quirks*/0, /*mintags*/2, /*maxtags*/2
 312         },
 313         {
 314                 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST36530*", "*"},
 315                 /*quirks*/0, /*mintags*/2, /*maxtags*/2
 316         },
 317         {
 318                 { T_DIRECT, SIP_MEDIA_FIXED, seagate, "ST39140*", "*"},
 319                 /*quirks*/0, /*mintags*/2, /*maxtags*/2
 320         },
 321         {
 322                 /*
 323                  * Slow when tagged queueing is enabled.  Write performance
 324                  * steadily drops off with more and more concurrent
 325                  * transactions.  Best sequential write performance with
 326                  * tagged queueing turned off and write caching turned on.
 327                  *
 328                  * PR:  kern/10398
 329                  * Submitted by:  Hideaki Okada <hokada@isl.melco.co.jp>
 330                  * Drive:  DCAS-34330 w/ "S65A" firmware.
 331                  *
 332                  * The drive with the problem had the "S65A" firmware
 333                  * revision, and has also been reported (by Stephen J.
 334                  * Roznowski <sjr@home.net>) for a drive with the "S61A"
 335                  * firmware revision.
 336                  *
 337                  * Although no one has reported problems with the 2 gig
 338                  * version of the DCAS drive, the assumption is that it
 339                  * has the same problems as the 4 gig version.  Therefore
 340                  * this quirk entries disables tagged queueing for all
 341                  * DCAS drives.
 342                  */
 343                 { T_DIRECT, SIP_MEDIA_FIXED, "IBM", "DCAS*", "*" },
 344                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 345         },
 346         {
 347                 /* Broken tagged queuing drive */
 348                 { T_DIRECT, SIP_MEDIA_REMOVABLE, "iomega", "jaz*", "*" },
 349                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 350         },
 351         {
 352                 /* Broken tagged queuing drive */
 353                 { T_DIRECT, SIP_MEDIA_FIXED, "CONNER", "CFP2107*", "*" },
 354                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 355         },
 356         {
 357                 /*
 358                  * Broken tagged queuing drive.
 359                  * Submitted by:
 360                  * NAKAJI Hiroyuki <nakaji@zeisei.dpri.kyoto-u.ac.jp>
 361                  * in PR kern/9535
 362                  */
 363                 { T_DIRECT, SIP_MEDIA_FIXED, samsung, "WN34324U*", "*" },
 364                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 365         },
 366         {
 367                 /*
 368                  * Slow when tagged queueing is enabled. (1.5MB/sec versus
 369                  * 8MB/sec.)
 370                  * Submitted by: Andrew Gallatin <gallatin@cs.duke.edu>
 371                  * Best performance with these drives is achieved with
 372                  * tagged queueing turned off, and write caching turned on.
 373                  */
 374                 { T_DIRECT, SIP_MEDIA_FIXED, west_digital, "WDE*", "*" },
 375                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 376         },
 377         {
 378                 /*
 379                  * Slow when tagged queueing is enabled. (1.5MB/sec versus
 380                  * 8MB/sec.)
 381                  * Submitted by: Andrew Gallatin <gallatin@cs.duke.edu>
 382                  * Best performance with these drives is achieved with
 383                  * tagged queueing turned off, and write caching turned on.
 384                  */
 385                 { T_DIRECT, SIP_MEDIA_FIXED, west_digital, "ENTERPRISE", "*" },
 386                 /*quirks*/0, /*mintags*/0, /*maxtags*/0
 387         },
 388         {
 389                 /*
 390                  * Doesn't handle queue full condition correctly,
 391                  * so we need to limit maxtags to what the device
 392                  * can handle instead of determining this automatically.
 393                  */
 394                 { T_DIRECT, SIP_MEDIA_FIXED, samsung, "WN321010S*", "*" },
 395                 /*quirks*/0, /*mintags*/2, /*maxtags*/32
 396         },
 397         {
 398                 /* Really only one LUN */
 399                 { T_ENCLOSURE, SIP_MEDIA_FIXED, "SUN", "SENA", "*" },
 400                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 401         },
 402         {
 403                 /* I can't believe we need a quirk for DPT volumes. */
 404                 { T_ANY, SIP_MEDIA_FIXED|SIP_MEDIA_REMOVABLE, "DPT", "*", "*" },
 405                 CAM_QUIRK_NOSERIAL|CAM_QUIRK_NOLUNS,
 406                 /*mintags*/0, /*maxtags*/255
 407         },
 408         {
 409                 /*
 410                  * Many Sony CDROM drives don't like multi-LUN probing.
 411                  */
 412                 { T_CDROM, SIP_MEDIA_REMOVABLE, sony, "CD-ROM CDU*", "*" },
 413                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 414         },
 415         {
 416                 /*
 417                  * This drive doesn't like multiple LUN probing.
 418                  * Submitted by:  Parag Patel <parag@cgt.com>
 419                  */
 420                 { T_WORM, SIP_MEDIA_REMOVABLE, sony, "CD-R   CDU9*", "*" },
 421                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 422         },
 423         {
 424                 { T_WORM, SIP_MEDIA_REMOVABLE, "YAMAHA", "CDR100*", "*" },
 425                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 426         },
 427         {
 428                 /*
 429                  * The 8200 doesn't like multi-lun probing, and probably
 430                  * don't like serial number requests either.
 431                  */
 432                 {
 433                         T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "EXABYTE",
 434                         "EXB-8200*", "*"
 435                 },
 436                 CAM_QUIRK_NOSERIAL|CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 437         },
 438         {
 439                 /*
 440                  * Let's try the same as above, but for a drive that says
 441                  * it's an IPL-6860 but is actually an EXB 8200.
 442                  */
 443                 {
 444                         T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "EXABYTE",
 445                         "IPL-6860*", "*"
 446                 },
 447                 CAM_QUIRK_NOSERIAL|CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 448         },
 449         {
 450                 /*
 451                  * These Hitachi drives don't like multi-lun probing.
 452                  * The PR submitter has a DK319H, but says that the Linux
 453                  * kernel has a similar work-around for the DK312 and DK314,
 454                  * so all DK31* drives are quirked here.
 455                  * PR:            misc/18793
 456                  * Submitted by:  Paul Haddad <paul@pth.com>
 457                  */
 458                 { T_DIRECT, SIP_MEDIA_FIXED, "HITACHI", "DK31*", "*" },
 459                 CAM_QUIRK_NOLUNS, /*mintags*/2, /*maxtags*/255
 460         },
 461         {
 462                 /*
 463                  * This old revision of the TDC3600 is also SCSI-1, and
 464                  * hangs upon serial number probing.
 465                  */
 466                 {
 467                         T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "TANDBERG",
 468                         " TDC 3600", "U07:"
 469                 },
 470                 CAM_QUIRK_NOSERIAL, /*mintags*/0, /*maxtags*/0
 471         },
 472         {
 473                 /*
 474                  * Would repond to all LUNs if asked for.
 475                  */
 476                 {
 477                         T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "CALIPER",
 478                         "CP150", "*"
 479                 },
 480                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 481         },
 482         {
 483                 /*
 484                  * Would repond to all LUNs if asked for.
 485                  */
 486                 {
 487                         T_SEQUENTIAL, SIP_MEDIA_REMOVABLE, "KENNEDY",
 488                         "96X2*", "*"
 489                 },
 490                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 491         },
 492         {
 493                 /* Submitted by: Matthew Dodd <winter@jurai.net> */
 494                 { T_PROCESSOR, SIP_MEDIA_FIXED, "Cabletrn", "EA41*", "*" },
 495                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 496         },
 497         {
 498                 /* Submitted by: Matthew Dodd <winter@jurai.net> */
 499                 { T_PROCESSOR, SIP_MEDIA_FIXED, "CABLETRN", "EA41*", "*" },
 500                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 501         },
 502         {
 503                 /* TeraSolutions special settings for TRC-22 RAID */
 504                 { T_DIRECT, SIP_MEDIA_FIXED, "TERASOLU", "TRC-22", "*" },
 505                   /*quirks*/0, /*mintags*/55, /*maxtags*/255
 506         },
 507         {
 508                 /* Veritas Storage Appliance */
 509                 { T_DIRECT, SIP_MEDIA_FIXED, "VERITAS", "*", "*" },
 510                   CAM_QUIRK_HILUNS, /*mintags*/2, /*maxtags*/1024
 511         },
 512         {
 513                 /*
 514                  * Would respond to all LUNs.  Device type and removable
 515                  * flag are jumper-selectable.
 516                  */
 517                 { T_ANY, SIP_MEDIA_REMOVABLE|SIP_MEDIA_FIXED, "MaxOptix",
 518                   "Tahiti 1", "*"
 519                 },
 520                 CAM_QUIRK_NOLUNS, /*mintags*/0, /*maxtags*/0
 521         },
 522         {
 523                 /* Default tagged queuing parameters for all devices */
 524                 {
 525                   T_ANY, SIP_MEDIA_REMOVABLE|SIP_MEDIA_FIXED,
 526                   /*vendor*/"*", /*product*/"*", /*revision*/"*"
 527                 },
 528                 /*quirks*/0, /*mintags*/2, /*maxtags*/255
 529         },
 530 };
 531
 532 static const int xpt_quirk_table_size =
 533         sizeof(xpt_quirk_table) / sizeof(*xpt_quirk_table);
 534
 535 typedef enum {
 536         DM_RET_COPY             = 0x01,
 537         DM_RET_FLAG_MASK        = 0x0f,
 538         DM_RET_NONE             = 0x00,
 539         DM_RET_STOP             = 0x10,
 540         DM_RET_DESCEND          = 0x20,
 541         DM_RET_ERROR            = 0x30,
 542         DM_RET_ACTION_MASK      = 0xf0
 543 } dev_match_ret;
 544
 545 typedef enum {
 546         XPT_DEPTH_BUS,
 547         XPT_DEPTH_TARGET,
 548         XPT_DEPTH_DEVICE,
 549         XPT_DEPTH_PERIPH
 550 } xpt_traverse_depth;
 551
 552 struct xpt_traverse_config {
 553         xpt_traverse_depth      depth;
 554         void                    *tr_func;
 555         void                    *tr_arg;
 556 };
 557
 558 typedef int     xpt_busfunc_t (struct cam_eb *bus, void *arg);
 559 typedef int     xpt_targetfunc_t (struct cam_et *target, void *arg);
 560 typedef int     xpt_devicefunc_t (struct cam_ed *device, void *arg);
 561 typedef int     xpt_periphfunc_t (struct cam_periph *periph, void *arg);
 562 typedef int     xpt_pdrvfunc_t (struct periph_driver **pdrv, void *arg);
 563
 564 /* Transport layer configuration information */
 565 static struct xpt_softc xsoftc;
 566
 567 /* Queues for our software interrupt handler */
 568 typedef TAILQ_HEAD(cam_isrq, ccb_hdr) cam_isrq_t;
 569 static cam_isrq_t cam_bioq;
 570 static cam_isrq_t cam_netq;
 571
 572 /* "Pool" of inactive ccbs managed by xpt_alloc_ccb and xpt_free_ccb */
 573 static SLIST_HEAD(,ccb_hdr) ccb_freeq;
 574 static u_int xpt_max_ccbs;      /*
 575                                  * Maximum size of ccb pool.  Modified as
 576                                  * devices are added/removed or have their
 577                                  * opening counts changed.
 578                                  */
 579 static u_int xpt_ccb_count;     /* Current count of allocated ccbs */
 580
 581 struct cam_periph *xpt_periph;
 582
 583 static periph_init_t xpt_periph_init;
 584
 585 static periph_init_t probe_periph_init;
 586
 587 static struct periph_driver xpt_driver =
 588 {
 589         xpt_periph_init, "xpt",
 590         TAILQ_HEAD_INITIALIZER(xpt_driver.units)
 591 };
 592
 593 static struct periph_driver probe_driver =
 594 {
 595         probe_periph_init, "probe",
 596         TAILQ_HEAD_INITIALIZER(probe_driver.units)
 597 };
 598
 599 DATA_SET(periphdriver_set, xpt_driver);
 600 DATA_SET(periphdriver_set, probe_driver);
 601
 602 #define XPT_CDEV_MAJOR 104
 603
 604 static d_open_t xptopen;
 605 static d_close_t xptclose;
 606 static d_ioctl_t xptioctl;
 607
 608 static struct cdevsw xpt_cdevsw = {
 609         /* name */      "xpt",
 610         /* maj */       XPT_CDEV_MAJOR,
 611         /* flags */     0,
 612         /* port */      NULL,
 613         /* clone */     NULL,
 614
 615         /* open */      xptopen,
 616         /* close */     xptclose,
 617         /* read */      noread,
 618         /* write */     nowrite,
 619         /* ioctl */     xptioctl,
 620         /* poll */      nopoll,
 621         /* mmap */      nommap,
 622         /* strategy */  nostrategy,
 623         /* dump */      nodump,
 624         /* psize */     nopsize
 625 };
 626
 627 static struct intr_config_hook *xpt_config_hook;
 628
 629 /* Registered busses */
 630 static TAILQ_HEAD(,cam_eb) xpt_busses;
 631 static u_int bus_generation;
 632
 633 /* Storage for debugging datastructures */
 634 #ifdef  CAMDEBUG
 635 struct cam_path *cam_dpath;
 636 u_int32_t cam_dflags;
 637 u_int32_t cam_debug_delay;
 638 #endif
 639
 640 #if defined(CAM_DEBUG_FLAGS) && !defined(CAMDEBUG)
 641 #error "You must have options CAMDEBUG to use options CAM_DEBUG_FLAGS"
 642 #endif
 643
 644 /*
 645  * In order to enable the CAM_DEBUG_* options, the user must have CAMDEBUG
 646  * enabled.  Also, the user must have either none, or all of CAM_DEBUG_BUS,
 647  * CAM_DEBUG_TARGET, and CAM_DEBUG_LUN specified.
 648  */
 649 #if defined(CAM_DEBUG_BUS) || defined(CAM_DEBUG_TARGET) \
 650     || defined(CAM_DEBUG_LUN)
 651 #ifdef CAMDEBUG
 652 #if !defined(CAM_DEBUG_BUS) || !defined(CAM_DEBUG_TARGET) \
 653     || !defined(CAM_DEBUG_LUN)
 654 #error "You must define all or none of CAM_DEBUG_BUS, CAM_DEBUG_TARGET \
 655         and CAM_DEBUG_LUN"
 656 #endif /* !CAM_DEBUG_BUS || !CAM_DEBUG_TARGET || !CAM_DEBUG_LUN */
 657 #else /* !CAMDEBUG */
 658 #error "You must use options CAMDEBUG if you use the CAM_DEBUG_* options"
 659 #endif /* CAMDEBUG */
 660 #endif /* CAM_DEBUG_BUS || CAM_DEBUG_TARGET || CAM_DEBUG_LUN */
 661
 662 /* Our boot-time initialization hook */
 663 static void     xpt_init(void *);
 664 SYSINIT(cam, SI_SUB_CONFIGURE, SI_ORDER_SECOND, xpt_init, NULL);
 665
 666 static cam_status       xpt_compile_path(struct cam_path *new_path,
 667                                          struct cam_periph *perph,
 668                                          path_id_t path_id,
 669                                          target_id_t target_id,
 670                                          lun_id_t lun_id);
 671
 672 static void             xpt_release_path(struct cam_path *path);
 673
 674 static void             xpt_async_bcast(struct async_list *async_head,
 675                                         u_int32_t async_code,
 676                                         struct cam_path *path,
 677                                         void *async_arg);
 678 static void             xpt_dev_async(u_int32_t async_code,
 679                                       struct cam_eb *bus,
 680                                       struct cam_et *target,
 681                                       struct cam_ed *device,
 682                                       void *async_arg);
 683 static path_id_t xptnextfreepathid(void);
 684 static path_id_t xptpathid(const char *sim_name, int sim_unit, int sim_bus);
 685 static union ccb *xpt_get_ccb(struct cam_ed *device);
 686 static int       xpt_schedule_dev(struct camq *queue, cam_pinfo *dev_pinfo,
 687                                   u_int32_t new_priority);
 688 static void      xpt_run_dev_allocq(struct cam_eb *bus);
 689 static void      xpt_run_dev_sendq(struct cam_eb *bus);
 690 static timeout_t xpt_release_devq_timeout;
 691 static timeout_t xpt_release_simq_timeout;
 692 static void      xpt_release_bus(struct cam_eb *bus);
 693 static void      xpt_release_devq_device(struct cam_ed *dev, u_int count,
 694                                          int run_queue);
 695 static struct cam_et*
 696                  xpt_alloc_target(struct cam_eb *bus, target_id_t target_id);
 697 static void      xpt_release_target(struct cam_eb *bus, struct cam_et *target);
 698 static struct cam_ed*
 699                  xpt_alloc_device(struct cam_eb *bus, struct cam_et *target,
 700                                   lun_id_t lun_id);
 701 static void      xpt_release_device(struct cam_eb *bus, struct cam_et *target,
 702                                     struct cam_ed *device);
 703 static u_int32_t xpt_dev_ccbq_resize(struct cam_path *path, int newopenings);
 704 static struct cam_eb*
 705                  xpt_find_bus(path_id_t path_id);
 706 static struct cam_et*
 707                  xpt_find_target(struct cam_eb *bus, target_id_t target_id);
 708 static struct cam_ed*
 709                  xpt_find_device(struct cam_et *target, lun_id_t lun_id);
 710 static void      xpt_scan_bus(struct cam_periph *periph, union ccb *ccb);
 711 static void      xpt_scan_lun(struct cam_periph *periph,
 712                               struct cam_path *path, cam_flags flags,
 713                               union ccb *ccb);
 714 static void      xptscandone(struct cam_periph *periph, union ccb *done_ccb);
 715 static xpt_busfunc_t    xptconfigbuscountfunc;
 716 static xpt_busfunc_t    xptconfigfunc;
 717 static void      xpt_config(void *arg);
 718 static xpt_devicefunc_t xptpassannouncefunc;
 719 static void      xpt_finishconfig(struct cam_periph *periph, union ccb *ccb);
 720 static void      xptaction(struct cam_sim *sim, union ccb *work_ccb);
 721 static void      xptpoll(struct cam_sim *sim);
 722 static inthand2_t swi_camnet;
 723 static inthand2_t swi_cambio;
 724 static void      camisr(cam_isrq_t *queue);
 725 #if 0
 726 static void      xptstart(struct cam_periph *periph, union ccb *work_ccb);
 727 static void      xptasync(struct cam_periph *periph,
 728                           u_int32_t code, cam_path *path);
 729 #endif
 730 static dev_match_ret    xptbusmatch(struct dev_match_pattern *patterns,
 731                                     int num_patterns, struct cam_eb *bus);
 732 static dev_match_ret    xptdevicematch(struct dev_match_pattern *patterns,
 733                                        int num_patterns, struct cam_ed *device);
 734 static dev_match_ret    xptperiphmatch(struct dev_match_pattern *patterns,
 735                                        int num_patterns,
 736                                        struct cam_periph *periph);
 737 static xpt_busfunc_t    xptedtbusfunc;
 738 static xpt_targetfunc_t xptedttargetfunc;
 739 static xpt_devicefunc_t xptedtdevicefunc;
 740 static xpt_periphfunc_t xptedtperiphfunc;
 741 static xpt_pdrvfunc_t   xptplistpdrvfunc;
 742 static xpt_periphfunc_t xptplistperiphfunc;
 743 static int              xptedtmatch(struct ccb_dev_match *cdm);
 744 static int              xptperiphlistmatch(struct ccb_dev_match *cdm);
 745 static int              xptbustraverse(struct cam_eb *start_bus,
 746                                        xpt_busfunc_t *tr_func, void *arg);
 747 static int              xpttargettraverse(struct cam_eb *bus,
 748                                           struct cam_et *start_target,
 749                                           xpt_targetfunc_t *tr_func, void *arg);
 750 static int              xptdevicetraverse(struct cam_et *target,
 751                                           struct cam_ed *start_device,
 752                                           xpt_devicefunc_t *tr_func, void *arg);
 753 static int              xptperiphtraverse(struct cam_ed *device,
 754                                           struct cam_periph *start_periph,
 755                                           xpt_periphfunc_t *tr_func, void *arg);
 756 static int              xptpdrvtraverse(struct periph_driver **start_pdrv,
 757                                         xpt_pdrvfunc_t *tr_func, void *arg);
 758 static int              xptpdperiphtraverse(struct periph_driver **pdrv,
 759                                             struct cam_periph *start_periph,
 760                                             xpt_periphfunc_t *tr_func,
 761                                             void *arg);
 762 static xpt_busfunc_t    xptdefbusfunc;
 763 static xpt_targetfunc_t xptdeftargetfunc;
 764 static xpt_devicefunc_t xptdefdevicefunc;
 765 static xpt_periphfunc_t xptdefperiphfunc;
 766 static int              xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg);
 767 #ifdef notusedyet
 768 static int              xpt_for_all_targets(xpt_targetfunc_t *tr_func,
 769                                             void *arg);
 770 #endif
 771 static int              xpt_for_all_devices(xpt_devicefunc_t *tr_func,
 772                                             void *arg);
 773 #ifdef notusedyet
 774 static int              xpt_for_all_periphs(xpt_periphfunc_t *tr_func,
 775                                             void *arg);
 776 #endif
 777 static xpt_devicefunc_t xptsetasyncfunc;
 778 static xpt_busfunc_t    xptsetasyncbusfunc;
 779 static cam_status       xptregister(struct cam_periph *periph,
 780                                     void *arg);
 781 static cam_status       proberegister(struct cam_periph *periph,
 782                                       void *arg);
 783 static void      probeschedule(struct cam_periph *probe_periph);
 784 static void      probestart(struct cam_periph *periph, union ccb *start_ccb);
 785 static void      proberequestdefaultnegotiation(struct cam_periph *periph);
 786 static void      probedone(struct cam_periph *periph, union ccb *done_ccb);
 787 static void      probecleanup(struct cam_periph *periph);
 788 static void      xpt_find_quirk(struct cam_ed *device);
 789 static void      xpt_set_transfer_settings(struct ccb_trans_settings *cts,
 790                                            struct cam_ed *device,
 791                                            int async_update);
 792 static void      xpt_toggle_tags(struct cam_path *path);
 793 static void      xpt_start_tags(struct cam_path *path);
 794 static __inline int xpt_schedule_dev_allocq(struct cam_eb *bus,
 795                                             struct cam_ed *dev);
 796 static __inline int xpt_schedule_dev_sendq(struct cam_eb *bus,
 797                                            struct cam_ed *dev);
 798 static __inline int periph_is_queued(struct cam_periph *periph);
 799 static __inline int device_is_alloc_queued(struct cam_ed *device);
 800 static __inline int device_is_send_queued(struct cam_ed *device);
 801 static __inline int dev_allocq_is_runnable(struct cam_devq *devq);
 802
 803 static __inline int
 804 xpt_schedule_dev_allocq(struct cam_eb *bus, struct cam_ed *dev)
 805 {
 806         int retval;
 807
 808         if (dev->ccbq.devq_openings > 0) {
 809                 if ((dev->flags & CAM_DEV_RESIZE_QUEUE_NEEDED) != 0) {
 810                         cam_ccbq_resize(&dev->ccbq,
 811                                         dev->ccbq.dev_openings
 812                                         + dev->ccbq.dev_active);
 813                         dev->flags &= ~CAM_DEV_RESIZE_QUEUE_NEEDED;
 814                 }
 815                 /*
 816                  * The priority of a device waiting for CCB resources
 817                  * is that of the the highest priority peripheral driver
 818                  * enqueued.
 819                  */
 820                 retval = xpt_schedule_dev(&bus->sim->devq->alloc_queue,
 821                                           &dev->alloc_ccb_entry.pinfo,
 822                                           CAMQ_GET_HEAD(&dev->drvq)->priority);
 823         } else {
 824                 retval = 0;
 825         }
 826
 827         return (retval);
 828 }
 829
 830 static __inline int
 831 xpt_schedule_dev_sendq(struct cam_eb *bus, struct cam_ed *dev)
 832 {
 833         int     retval;
 834
 835         if (dev->ccbq.dev_openings > 0) {
 836                 /*
 837                  * The priority of a device waiting for controller
 838                  * resources is that of the the highest priority CCB
 839                  * enqueued.
 840                  */
 841                 retval =
 842                     xpt_schedule_dev(&bus->sim->devq->send_queue,
 843                                      &dev->send_ccb_entry.pinfo,
 844                                      CAMQ_GET_HEAD(&dev->ccbq.queue)->priority);
 845         } else {
 846                 retval = 0;
 847         }
 848         return (retval);
 849 }
 850
 851 static __inline int
 852 periph_is_queued(struct cam_periph *periph)
 853 {
 854         return (periph->pinfo.index != CAM_UNQUEUED_INDEX);
 855 }
 856
 857 static __inline int
 858 device_is_alloc_queued(struct cam_ed *device)
 859 {
 860         return (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX);
 861 }
 862
 863 static __inline int
 864 device_is_send_queued(struct cam_ed *device)
 865 {
 866         return (device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX);
 867 }
 868
 869 static __inline int
 870 dev_allocq_is_runnable(struct cam_devq *devq)
 871 {
 872         /*
 873          * Have work to do.
 874          * Have space to do more work.
 875          * Allowed to do work.
 876          */
 877         return ((devq->alloc_queue.qfrozen_cnt == 0)
 878              && (devq->alloc_queue.entries > 0)
 879              && (devq->alloc_openings > 0));
 880 }
 881
 882 static void
 883 xpt_periph_init()
 884 {
 885         make_dev(&xpt_cdevsw, 0, UID_ROOT, GID_OPERATOR, 0600, "xpt0");
 886 }
 887
 888 static void
 889 probe_periph_init()
 890 {
 891 }
 892
 893
 894 static void
 895 xptdone(struct cam_periph *periph, union ccb *done_ccb)
 896 {
 897         /* Caller will release the CCB */
 898         wakeup(&done_ccb->ccb_h.cbfcnp);
 899 }
 900
 901 static int
 902 xptopen(dev_t dev, int flags, int fmt, struct thread *td)
 903 {
 904         int unit;
 905
 906         unit = minor(dev) & 0xff;
 907
 908         /*
 909          * Only allow read-write access.
 910          */
 911         if (((flags & FWRITE) == 0) || ((flags & FREAD) == 0))
 912                 return(EPERM);
 913
 914         /*
 915          * We don't allow nonblocking access.
 916          */
 917         if ((flags & O_NONBLOCK) != 0) {
 918                 printf("xpt%d: can't do nonblocking access\n", unit);
 919                 return(ENODEV);
 920         }
 921
 922         /*
 923          * We only have one transport layer right now.  If someone accesses
 924          * us via something other than minor number 1, point out their
 925          * mistake.
 926          */
 927         if (unit != 0) {
 928                 printf("xptopen: got invalid xpt unit %d\n", unit);
 929                 return(ENXIO);
 930         }
 931
 932         /* Mark ourselves open */
 933         xsoftc.flags |= XPT_FLAG_OPEN;
 934
 935         return(0);
 936 }
 937
 938 static int
 939 xptclose(dev_t dev, int flag, int fmt, struct thread *td)
 940 {
 941         int unit;
 942
 943         unit = minor(dev) & 0xff;
 944
 945         /*
 946          * We only have one transport layer right now.  If someone accesses
 947          * us via something other than minor number 1, point out their
 948          * mistake.
 949          */
 950         if (unit != 0) {
 951                 printf("xptclose: got invalid xpt unit %d\n", unit);
 952                 return(ENXIO);
 953         }
 954
 955         /* Mark ourselves closed */
 956         xsoftc.flags &= ~XPT_FLAG_OPEN;
 957
 958         return(0);
 959 }
 960
 961 static int
 962 xptioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
 963 {
 964         int unit, error;
 965
 966         error = 0;
 967         unit = minor(dev) & 0xff;
 968
 969         /*
 970          * We only have one transport layer right now.  If someone accesses
 971          * us via something other than minor number 1, point out their
 972          * mistake.
 973          */
 974         if (unit != 0) {
 975                 printf("xptioctl: got invalid xpt unit %d\n", unit);
 976                 return(ENXIO);
 977         }
 978
 979         switch(cmd) {
 980         /*
 981          * For the transport layer CAMIOCOMMAND ioctl, we really only want
 982          * to accept CCB types that don't quite make sense to send through a
 983          * passthrough driver.
 984          */
 985         case CAMIOCOMMAND: {
 986                 union ccb *ccb;
 987                 union ccb *inccb;
 988
 989                 inccb = (union ccb *)addr;
 990
 991                 switch(inccb->ccb_h.func_code) {
 992                 case XPT_SCAN_BUS:
 993                 case XPT_RESET_BUS:
 994                         if ((inccb->ccb_h.target_id != CAM_TARGET_WILDCARD)
 995                          || (inccb->ccb_h.target_lun != CAM_LUN_WILDCARD)) {
 996                                 error = EINVAL;
 997                                 break;
 998                         }
 999                         /* FALLTHROUGH */
1000                 case XPT_PATH_INQ:
1001                 case XPT_ENG_INQ:
1002                 case XPT_SCAN_LUN:
1003
1004                         ccb = xpt_alloc_ccb();
1005
1006                         /*
1007                          * Create a path using the bus, target, and lun the
1008                          * user passed in.
1009                          */
1010                         if (xpt_create_path(&ccb->ccb_h.path, xpt_periph,
1011                                             inccb->ccb_h.path_id,
1012                                             inccb->ccb_h.target_id,
1013                                             inccb->ccb_h.target_lun) !=
1014                                             CAM_REQ_CMP){
1015                                 error = EINVAL;
1016                                 xpt_free_ccb(ccb);
1017                                 break;
1018                         }
1019                         /* Ensure all of our fields are correct */
1020                         xpt_setup_ccb(&ccb->ccb_h, ccb->ccb_h.path,
1021                                       inccb->ccb_h.pinfo.priority);
1022                         xpt_merge_ccb(ccb, inccb);
1023                         ccb->ccb_h.cbfcnp = xptdone;
1024                         cam_periph_runccb(ccb, NULL, 0, 0, NULL);
1025                         bcopy(ccb, inccb, sizeof(union ccb));
1026                         xpt_free_path(ccb->ccb_h.path);
1027                         xpt_free_ccb(ccb);
1028                         break;
1029
1030                 case XPT_DEBUG: {
1031                         union ccb ccb;
1032
1033                         /*
1034                          * This is an immediate CCB, so it's okay to
1035                          * allocate it on the stack.
1036                          */
1037
1038                         /*
1039                          * Create a path using the bus, target, and lun the
1040                          * user passed in.
1041                          */
1042                         if (xpt_create_path(&ccb.ccb_h.path, xpt_periph,
1043                                             inccb->ccb_h.path_id,
1044                                             inccb->ccb_h.target_id,
1045                                             inccb->ccb_h.target_lun) !=
1046                                             CAM_REQ_CMP){
1047                                 error = EINVAL;
1048                                 break;
1049                         }
1050                         /* Ensure all of our fields are correct */
1051                         xpt_setup_ccb(&ccb.ccb_h, ccb.ccb_h.path,
1052                                       inccb->ccb_h.pinfo.priority);
1053                         xpt_merge_ccb(&ccb, inccb);
1054                         ccb.ccb_h.cbfcnp = xptdone;
1055                         xpt_action(&ccb);
1056                         bcopy(&ccb, inccb, sizeof(union ccb));
1057                         xpt_free_path(ccb.ccb_h.path);
1058                         break;
1059
1060                 }
1061                 case XPT_DEV_MATCH: {
1062                         struct cam_periph_map_info mapinfo;
1063                         struct cam_path *old_path;
1064
1065                         /*
1066                          * We can't deal with physical addresses for this
1067                          * type of transaction.
1068                          */
1069                         if (inccb->ccb_h.flags & CAM_DATA_PHYS) {
1070                                 error = EINVAL;
1071                                 break;
1072                         }
1073
1074                         /*
1075                          * Save this in case the caller had it set to
1076                          * something in particular.
1077                          */
1078                         old_path = inccb->ccb_h.path;
1079
1080                         /*
1081                          * We really don't need a path for the matching
1082                          * code.  The path is needed because of the
1083                          * debugging statements in xpt_action().  They
1084                          * assume that the CCB has a valid path.
1085                          */
1086                         inccb->ccb_h.path = xpt_periph->path;
1087
1088                         bzero(&mapinfo, sizeof(mapinfo));
1089
1090                         /*
1091                          * Map the pattern and match buffers into kernel
1092                          * virtual address space.
1093                          */
1094                         error = cam_periph_mapmem(inccb, &mapinfo);
1095
1096                         if (error) {
1097                                 inccb->ccb_h.path = old_path;
1098                                 break;
1099                         }
1100
1101                         /*
1102                          * This is an immediate CCB, we can send it on directly.
1103                          */
1104                         xpt_action(inccb);
1105
1106                         /*
1107                          * Map the buffers back into user space.
1108                          */
1109                         cam_periph_unmapmem(inccb, &mapinfo);
1110
1111                         inccb->ccb_h.path = old_path;
1112
1113                         error = 0;
1114                         break;
1115                 }
1116                 default:
1117                         error = ENOTSUP;
1118                         break;
1119                 }
1120                 break;
1121         }
1122         /*
1123          * This is the getpassthru ioctl. It takes a XPT_GDEVLIST ccb as input,
1124          * with the periphal driver name and unit name filled in.  The other
1125          * fields don't really matter as input.  The passthrough driver name
1126          * ("pass"), and unit number are passed back in the ccb.  The current
1127          * device generation number, and the index into the device peripheral
1128          * driver list, and the status are also passed back.  Note that
1129          * since we do everything in one pass, unlike the XPT_GDEVLIST ccb,
1130          * we never return a status of CAM_GDEVLIST_LIST_CHANGED.  It is
1131          * (or rather should be) impossible for the device peripheral driver
1132          * list to change since we look at the whole thing in one pass, and
1133          * we do it with splcam protection.
1134          *
1135          */
1136         case CAMGETPASSTHRU: {
1137                 union ccb *ccb;
1138                 struct cam_periph *periph;
1139                 struct periph_driver **p_drv;
1140                 char   *name;
1141                 int unit;
1142                 int cur_generation;
1143                 int base_periph_found;
1144                 int splbreaknum;
1145                 int s;
1146
1147                 ccb = (union ccb *)addr;
1148                 unit = ccb->cgdl.unit_number;
1149                 name = ccb->cgdl.periph_name;
1150                 /*
1151                  * Every 100 devices, we want to drop our spl protection to
1152                  * give the software interrupt handler a chance to run.
1153                  * Most systems won't run into this check, but this should
1154                  * avoid starvation in the software interrupt handler in
1155                  * large systems.
1156                  */
1157                 splbreaknum = 100;
1158
1159                 ccb = (union ccb *)addr;
1160
1161                 base_periph_found = 0;
1162
1163                 /*
1164                  * Sanity check -- make sure we don't get a null peripheral
1165                  * driver name.
1166                  */
1167                 if (*ccb->cgdl.periph_name == '\0') {
1168                         error = EINVAL;
1169                         break;
1170                 }
1171
1172                 /* Keep the list from changing while we traverse it */
1173                 s = splcam();
1174 ptstartover:
1175                 cur_generation = xsoftc.generation;
1176
1177                 /* first find our driver in the list of drivers */
1178                 SET_FOREACH(p_drv, periphdriver_set) {
1179                         if (strcmp((*p_drv)->driver_name, name) == 0)
1180                                 break;
1181                 }
1182
1183                 if (*p_drv == NULL) {
1184                         splx(s);
1185                         ccb->ccb_h.status = CAM_REQ_CMP_ERR;
1186                         ccb->cgdl.status = CAM_GDEVLIST_ERROR;
1187                         *ccb->cgdl.periph_name = '\0';
1188                         ccb->cgdl.unit_number = 0;
1189                         error = ENOENT;
1190                         break;
1191                 }
1192
1193                 /*
1194                  * Run through every peripheral instance of this driver
1195                  * and check to see whether it matches the unit passed
1196                  * in by the user.  If it does, get out of the loops and
1197                  * find the passthrough driver associated with that
1198                  * peripheral driver.
1199                  */
1200                 for (periph = TAILQ_FIRST(&(*p_drv)->units); periph != NULL;
1201                      periph = TAILQ_NEXT(periph, unit_links)) {
1202
1203                         if (periph->unit_number == unit) {
1204                                 break;
1205                         } else if (--splbreaknum == 0) {
1206                                 splx(s);
1207                                 s = splcam();
1208                                 splbreaknum = 100;
1209                                 if (cur_generation != xsoftc.generation)
1210                                        goto ptstartover;
1211                         }
1212                 }
1213                 /*
1214                  * If we found the peripheral driver that the user passed
1215                  * in, go through all of the peripheral drivers for that
1216                  * particular device and look for a passthrough driver.
1217                  */
1218                 if (periph != NULL) {
1219                         struct cam_ed *device;
1220                         int i;
1221
1222                         base_periph_found = 1;
1223                         device = periph->path->device;
1224                         for (i = 0, periph = device->periphs.slh_first;
1225                              periph != NULL;
1226                              periph = periph->periph_links.sle_next, i++) {
1227                                 /*
1228                                  * Check to see whether we have a
1229                                  * passthrough device or not.
1230                                  */
1231                                 if (strcmp(periph->periph_name, "pass") == 0) {
1232                                         /*
1233                                          * Fill in the getdevlist fields.
1234                                          */
1235                                         strcpy(ccb->cgdl.periph_name,
1236                                                periph->periph_name);
1237                                         ccb->cgdl.unit_number =
1238                                                 periph->unit_number;
1239                                         if (periph->periph_links.sle_next)
1240                                                 ccb->cgdl.status =
1241                                                         CAM_GDEVLIST_MORE_DEVS;
1242                                         else
1243                                                 ccb->cgdl.status =
1244                                                        CAM_GDEVLIST_LAST_DEVICE;
1245                                         ccb->cgdl.generation =
1246                                                 device->generation;
1247                                         ccb->cgdl.index = i;
1248                                         /*
1249                                          * Fill in some CCB header fields
1250                                          * that the user may want.
1251                                          */
1252                                         ccb->ccb_h.path_id =
1253                                                 periph->path->bus->path_id;
1254                                         ccb->ccb_h.target_id =
1255                                                 periph->path->target->target_id;
1256                                         ccb->ccb_h.target_lun =
1257                                                 periph->path->device->lun_id;
1258                                         ccb->ccb_h.status = CAM_REQ_CMP;
1259                                         break;
1260                                 }
1261                         }
1262                 }
1263
1264                 /*
1265                  * If the periph is null here, one of two things has
1266                  * happened.  The first possibility is that we couldn't
1267                  * find the unit number of the particular peripheral driver
1268                  * that the user is asking about.  e.g. the user asks for
1269                  * the passthrough driver for "da11".  We find the list of
1270                  * "da" peripherals all right, but there is no unit 11.
1271                  * The other possibility is that we went through the list
1272                  * of peripheral drivers attached to the device structure,
1273                  * but didn't find one with the name "pass".  Either way,
1274                  * we return ENOENT, since we couldn't find something.
1275                  */
1276                 if (periph == NULL) {
1277                         ccb->ccb_h.status = CAM_REQ_CMP_ERR;
1278                         ccb->cgdl.status = CAM_GDEVLIST_ERROR;
1279                         *ccb->cgdl.periph_name = '\0';
1280                         ccb->cgdl.unit_number = 0;
1281                         error = ENOENT;
1282                         /*
1283                          * It is unfortunate that this is even necessary,
1284                          * but there are many, many clueless users out there.
1285                          * If this is true, the user is looking for the
1286                          * passthrough driver, but doesn't have one in his
1287                          * kernel.
1288                          */
1289                         if (base_periph_found == 1) {
1290                                 printf("xptioctl: pass driver is not in the "
1291                                        "kernel\n");
1292                                 printf("xptioctl: put \"device pass0\" in "
1293                                        "your kernel config file\n");
1294                         }
1295                 }
1296                 splx(s);
1297                 break;
1298                 }
1299         default:
1300                 error = ENOTTY;
1301                 break;
1302         }
1303
1304         return(error);
1305 }
1306
1307 /* Functions accessed by the peripheral drivers */
1308 static void
1309 xpt_init(dummy)
1310         void *dummy;
1311 {
1312         struct cam_sim *xpt_sim;
1313         struct cam_path *path;
1314         struct cam_devq *devq;
1315         cam_status status;
1316
1317         TAILQ_INIT(&xpt_busses);
1318         TAILQ_INIT(&cam_bioq);
1319         TAILQ_INIT(&cam_netq);
1320         SLIST_INIT(&ccb_freeq);
1321         STAILQ_INIT(&highpowerq);
1322
1323         /*
1324          * The xpt layer is, itself, the equivelent of a SIM.
1325          * Allow 16 ccbs in the ccb pool for it.  This should
1326          * give decent parallelism when we probe busses and
1327          * perform other XPT functions.
1328          */
1329         devq = cam_simq_alloc(16);
1330         xpt_sim = cam_sim_alloc(xptaction,
1331                                 xptpoll,
1332                                 "xpt",
1333                                 /*softc*/NULL,
1334                                 /*unit*/0,
1335                                 /*max_dev_transactions*/0,
1336                                 /*max_tagged_dev_transactions*/0,
1337                                 devq);
1338         cam_simq_release(devq);
1339         xpt_max_ccbs = 16;
1340
1341         xpt_bus_register(xpt_sim, /*bus #*/0);
1342
1343         /*
1344          * Looking at the XPT from the SIM layer, the XPT is
1345          * the equivelent of a peripheral driver.  Allocate
1346          * a peripheral driver entry for us.
1347          */
1348         if ((status = xpt_create_path(&path, NULL, CAM_XPT_PATH_ID,
1349                                       CAM_TARGET_WILDCARD,
1350                                       CAM_LUN_WILDCARD)) != CAM_REQ_CMP) {
1351                 printf("xpt_init: xpt_create_path failed with status %#x,"
1352                        " failing attach\n", status);
1353                 return;
1354         }
1355
1356         cam_periph_alloc(xptregister, NULL, NULL, NULL, "xpt", CAM_PERIPH_BIO,
1357                          path, NULL, 0, NULL);
1358         xpt_free_path(path);
1359
1360         xpt_sim->softc = xpt_periph;
1361
1362         /*
1363          * Register a callback for when interrupts are enabled.
1364          */
1365         xpt_config_hook = malloc(sizeof(struct intr_config_hook),
1366                                   M_TEMP, M_INTWAIT | M_ZERO);
1367         xpt_config_hook->ich_func = xpt_config;
1368         if (config_intrhook_establish(xpt_config_hook) != 0) {
1369                 free (xpt_config_hook, M_TEMP);
1370                 printf("xpt_init: config_intrhook_establish failed "
1371                        "- failing attach\n");
1372         }
1373
1374         /* Install our software interrupt handlers */
1375         register_swi(SWI_CAMNET, swi_camnet, NULL, "swi_camnet");
1376         register_swi(SWI_CAMBIO, swi_cambio, NULL, "swi_cambio");
1377 }
1378
1379 static cam_status
1380 xptregister(struct cam_periph *periph, void *arg)
1381 {
1382         if (periph == NULL) {
1383                 printf("xptregister: periph was NULL!!\n");
1384                 return(CAM_REQ_CMP_ERR);
1385         }
1386
1387         periph->softc = NULL;
1388
1389         xpt_periph = periph;
1390
1391         return(CAM_REQ_CMP);
1392 }
1393
1394 int32_t
1395 xpt_add_periph(struct cam_periph *periph)
1396 {
1397         struct cam_ed *device;
1398         int32_t  status;
1399         struct periph_list *periph_head;
1400
1401         device = periph->path->device;
1402
1403         periph_head = &device->periphs;
1404
1405         status = CAM_REQ_CMP;
1406
1407         if (device != NULL) {
1408                 int s;
1409
1410                 /*
1411                  * Make room for this peripheral
1412                  * so it will fit in the queue
1413                  * when it's scheduled to run
1414                  */
1415                 s = splsoftcam();
1416                 status = camq_resize(&device->drvq,
1417                                      device->drvq.array_size + 1);
1418
1419                 device->generation++;
1420
1421                 SLIST_INSERT_HEAD(periph_head, periph, periph_links);
1422
1423                 splx(s);
1424         }
1425
1426         xsoftc.generation++;
1427
1428         return (status);
1429 }
1430
1431 void
1432 xpt_remove_periph(struct cam_periph *periph)
1433 {
1434         struct cam_ed *device;
1435
1436         device = periph->path->device;
1437
1438         if (device != NULL) {
1439                 int s;
1440                 struct periph_list *periph_head;
1441
1442                 periph_head = &device->periphs;
1443
1444                 /* Release the slot for this peripheral */
1445                 s = splsoftcam();
1446                 camq_resize(&device->drvq, device->drvq.array_size - 1);
1447
1448                 device->generation++;
1449
1450                 SLIST_REMOVE(periph_head, periph, cam_periph, periph_links);
1451
1452                 splx(s);
1453         }
1454
1455         xsoftc.generation++;
1456
1457 }
1458
1459 void
1460 xpt_announce_periph(struct cam_periph *periph, char *announce_string)
1461 {
1462         int s;
1463         u_int mb;
1464         struct cam_path *path;
1465         struct ccb_trans_settings cts;
1466
1467         path = periph->path;
1468         /*
1469          * To ensure that this is printed in one piece,
1470          * mask out CAM interrupts.
1471          */
1472         s = splsoftcam();
1473         printf("%s%d at %s%d bus %d target %d lun %d\n",
1474                periph->periph_name, periph->unit_number,
1475                path->bus->sim->sim_name,
1476                path->bus->sim->unit_number,
1477                path->bus->sim->bus_id,
1478                path->target->target_id,
1479                path->device->lun_id);
1480         printf("%s%d: ", periph->periph_name, periph->unit_number);
1481         scsi_print_inquiry(&path->device->inq_data);
1482         if ((bootverbose)
1483          && (path->device->serial_num_len > 0)) {
1484                 /* Don't wrap the screen  - print only the first 60 chars */
1485                 printf("%s%d: Serial Number %.60s\n", periph->periph_name,
1486                        periph->unit_number, path->device->serial_num);
1487         }
1488         xpt_setup_ccb(&cts.ccb_h, path, /*priority*/1);
1489         cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS;
1490         cts.flags = CCB_TRANS_CURRENT_SETTINGS;
1491         xpt_action((union ccb*)&cts);
1492         if (cts.ccb_h.status == CAM_REQ_CMP) {
1493                 u_int speed;
1494                 u_int freq;
1495
1496                 if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0
1497                   && cts.sync_offset != 0) {
1498                         freq = scsi_calc_syncsrate(cts.sync_period);
1499                         speed = freq;
1500                 } else {
1501                         struct ccb_pathinq cpi;
1502
1503                         /* Ask the SIM for its base transfer speed */
1504                         xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1);
1505                         cpi.ccb_h.func_code = XPT_PATH_INQ;
1506                         xpt_action((union ccb *)&cpi);
1507
1508                         speed = cpi.base_transfer_speed;
1509                         freq = 0;
1510                 }
1511                 if ((cts.valid & CCB_TRANS_BUS_WIDTH_VALID) != 0)
1512                         speed *= (0x01 << cts.bus_width);
1513                 mb = speed / 1000;
1514                 if (mb > 0)
1515                         printf("%s%d: %d.%03dMB/s transfers",
1516                                periph->periph_name, periph->unit_number,
1517                                mb, speed % 1000);
1518                 else
1519                         printf("%s%d: %dKB/s transfers", periph->periph_name,
1520                                periph->unit_number, speed);
1521                 if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0
1522                  && cts.sync_offset != 0) {
1523                         printf(" (%d.%03dMHz, offset %d", freq / 1000,
1524                                freq % 1000, cts.sync_offset);
1525                 }
1526                 if ((cts.valid & CCB_TRANS_BUS_WIDTH_VALID) != 0
1527                  && cts.bus_width > 0) {
1528                         if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0
1529                          && cts.sync_offset != 0) {
1530                                 printf(", ");
1531                         } else {
1532                                 printf(" (");
1533                         }
1534                         printf("%dbit)", 8 * (0x01 << cts.bus_width));
1535                 } else if ((cts.valid & CCB_TRANS_SYNC_OFFSET_VALID) != 0
1536                         && cts.sync_offset != 0) {
1537                         printf(")");
1538                 }
1539
1540                 if (path->device->inq_flags & SID_CmdQue
1541                  || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) {
1542                         printf(", Tagged Queueing Enabled");
1543                 }
1544
1545                 printf("\n");
1546         } else if (path->device->inq_flags & SID_CmdQue
1547                 || path->device->flags & CAM_DEV_TAG_AFTER_COUNT) {
1548                 printf("%s%d: Tagged Queueing Enabled\n",
1549                        periph->periph_name, periph->unit_number);
1550         }
1551
1552         /*
1553          * We only want to print the caller's announce string if they've
1554          * passed one in..
1555          */
1556         if (announce_string != NULL)
1557                 printf("%s%d: %s\n", periph->periph_name,
1558                        periph->unit_number, announce_string);
1559         splx(s);
1560 }
1561
1562
1563 static dev_match_ret
1564 xptbusmatch(struct dev_match_pattern *patterns, int num_patterns,
1565             struct cam_eb *bus)
1566 {
1567         dev_match_ret retval;
1568         int i;
1569
1570         retval = DM_RET_NONE;
1571
1572         /*
1573          * If we aren't given something to match against, that's an error.
1574          */
1575         if (bus == NULL)
1576                 return(DM_RET_ERROR);
1577
1578         /*
1579          * If there are no match entries, then this bus matches no
1580          * matter what.
1581          */
1582         if ((patterns == NULL) || (num_patterns == 0))
1583                 return(DM_RET_DESCEND | DM_RET_COPY);
1584
1585         for (i = 0; i < num_patterns; i++) {
1586                 struct bus_match_pattern *cur_pattern;
1587
1588                 /*
1589                  * If the pattern in question isn't for a bus node, we
1590                  * aren't interested.  However, we do indicate to the
1591                  * calling routine that we should continue descending the
1592                  * tree, since the user wants to match against lower-level
1593                  * EDT elements.
1594                  */
1595                 if (patterns[i].type != DEV_MATCH_BUS) {
1596                         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1597                                 retval |= DM_RET_DESCEND;
1598                         continue;
1599                 }
1600
1601                 cur_pattern = &patterns[i].pattern.bus_pattern;
1602
1603                 /*
1604                  * If they want to match any bus node, we give them any
1605                  * device node.
1606                  */
1607                 if (cur_pattern->flags == BUS_MATCH_ANY) {
1608                         /* set the copy flag */
1609                         retval |= DM_RET_COPY;
1610
1611                         /*
1612                          * If we've already decided on an action, go ahead
1613                          * and return.
1614                          */
1615                         if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE)
1616                                 return(retval);
1617                 }
1618
1619                 /*
1620                  * Not sure why someone would do this...
1621                  */
1622                 if (cur_pattern->flags == BUS_MATCH_NONE)
1623                         continue;
1624
1625                 if (((cur_pattern->flags & BUS_MATCH_PATH) != 0)
1626                  && (cur_pattern->path_id != bus->path_id))
1627                         continue;
1628
1629                 if (((cur_pattern->flags & BUS_MATCH_BUS_ID) != 0)
1630                  && (cur_pattern->bus_id != bus->sim->bus_id))
1631                         continue;
1632
1633                 if (((cur_pattern->flags & BUS_MATCH_UNIT) != 0)
1634                  && (cur_pattern->unit_number != bus->sim->unit_number))
1635                         continue;
1636
1637                 if (((cur_pattern->flags & BUS_MATCH_NAME) != 0)
1638                  && (strncmp(cur_pattern->dev_name, bus->sim->sim_name,
1639                              DEV_IDLEN) != 0))
1640                         continue;
1641
1642                 /*
1643                  * If we get to this point, the user definitely wants
1644                  * information on this bus.  So tell the caller to copy the
1645                  * data out.
1646                  */
1647                 retval |= DM_RET_COPY;
1648
1649                 /*
1650                  * If the return action has been set to descend, then we
1651                  * know that we've already seen a non-bus matching
1652                  * expression, therefore we need to further descend the tree.
1653                  * This won't change by continuing around the loop, so we
1654                  * go ahead and return.  If we haven't seen a non-bus
1655                  * matching expression, we keep going around the loop until
1656                  * we exhaust the matching expressions.  We'll set the stop
1657                  * flag once we fall out of the loop.
1658                  */
1659                 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1660                         return(retval);
1661         }
1662
1663         /*
1664          * If the return action hasn't been set to descend yet, that means
1665          * we haven't seen anything other than bus matching patterns.  So
1666          * tell the caller to stop descending the tree -- the user doesn't
1667          * want to match against lower level tree elements.
1668          */
1669         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1670                 retval |= DM_RET_STOP;
1671
1672         return(retval);
1673 }
1674
1675 static dev_match_ret
1676 xptdevicematch(struct dev_match_pattern *patterns, int num_patterns,
1677                struct cam_ed *device)
1678 {
1679         dev_match_ret retval;
1680         int i;
1681
1682         retval = DM_RET_NONE;
1683
1684         /*
1685          * If we aren't given something to match against, that's an error.
1686          */
1687         if (device == NULL)
1688                 return(DM_RET_ERROR);
1689
1690         /*
1691          * If there are no match entries, then this device matches no
1692          * matter what.
1693          */
1694         if ((patterns == NULL) || (patterns == 0))
1695                 return(DM_RET_DESCEND | DM_RET_COPY);
1696
1697         for (i = 0; i < num_patterns; i++) {
1698                 struct device_match_pattern *cur_pattern;
1699
1700                 /*
1701                  * If the pattern in question isn't for a device node, we
1702                  * aren't interested.
1703                  */
1704                 if (patterns[i].type != DEV_MATCH_DEVICE) {
1705                         if ((patterns[i].type == DEV_MATCH_PERIPH)
1706                          && ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE))
1707                                 retval |= DM_RET_DESCEND;
1708                         continue;
1709                 }
1710
1711                 cur_pattern = &patterns[i].pattern.device_pattern;
1712
1713                 /*
1714                  * If they want to match any device node, we give them any
1715                  * device node.
1716                  */
1717                 if (cur_pattern->flags == DEV_MATCH_ANY) {
1718                         /* set the copy flag */
1719                         retval |= DM_RET_COPY;
1720
1721
1722                         /*
1723                          * If we've already decided on an action, go ahead
1724                          * and return.
1725                          */
1726                         if ((retval & DM_RET_ACTION_MASK) != DM_RET_NONE)
1727                                 return(retval);
1728                 }
1729
1730                 /*
1731                  * Not sure why someone would do this...
1732                  */
1733                 if (cur_pattern->flags == DEV_MATCH_NONE)
1734                         continue;
1735
1736                 if (((cur_pattern->flags & DEV_MATCH_PATH) != 0)
1737                  && (cur_pattern->path_id != device->target->bus->path_id))
1738                         continue;
1739
1740                 if (((cur_pattern->flags & DEV_MATCH_TARGET) != 0)
1741                  && (cur_pattern->target_id != device->target->target_id))
1742                         continue;
1743
1744                 if (((cur_pattern->flags & DEV_MATCH_LUN) != 0)
1745                  && (cur_pattern->target_lun != device->lun_id))
1746                         continue;
1747
1748                 if (((cur_pattern->flags & DEV_MATCH_INQUIRY) != 0)
1749                  && (cam_quirkmatch((caddr_t)&device->inq_data,
1750                                     (caddr_t)&cur_pattern->inq_pat,
1751                                     1, sizeof(cur_pattern->inq_pat),
1752                                     scsi_static_inquiry_match) == NULL))
1753                         continue;
1754
1755                 /*
1756                  * If we get to this point, the user definitely wants
1757                  * information on this device.  So tell the caller to copy
1758                  * the data out.
1759                  */
1760                 retval |= DM_RET_COPY;
1761
1762                 /*
1763                  * If the return action has been set to descend, then we
1764                  * know that we've already seen a peripheral matching
1765                  * expression, therefore we need to further descend the tree.
1766                  * This won't change by continuing around the loop, so we
1767                  * go ahead and return.  If we haven't seen a peripheral
1768                  * matching expression, we keep going around the loop until
1769                  * we exhaust the matching expressions.  We'll set the stop
1770                  * flag once we fall out of the loop.
1771                  */
1772                 if ((retval & DM_RET_ACTION_MASK) == DM_RET_DESCEND)
1773                         return(retval);
1774         }
1775
1776         /*
1777          * If the return action hasn't been set to descend yet, that means
1778          * we haven't seen any peripheral matching patterns.  So tell the
1779          * caller to stop descending the tree -- the user doesn't want to
1780          * match against lower level tree elements.
1781          */
1782         if ((retval & DM_RET_ACTION_MASK) == DM_RET_NONE)
1783                 retval |= DM_RET_STOP;
1784
1785         return(retval);
1786 }
1787
1788 /*
1789  * Match a single peripheral against any number of match patterns.
1790  */
1791 static dev_match_ret
1792 xptperiphmatch(struct dev_match_pattern *patterns, int num_patterns,
1793                struct cam_periph *periph)
1794 {
1795         dev_match_ret retval;
1796         int i;
1797
1798         /*
1799          * If we aren't given something to match against, that's an error.
1800          */
1801         if (periph == NULL)
1802                 return(DM_RET_ERROR);
1803
1804         /*
1805          * If there are no match entries, then this peripheral matches no
1806          * matter what.
1807          */
1808         if ((patterns == NULL) || (num_patterns == 0))
1809                 return(DM_RET_STOP | DM_RET_COPY);
1810
1811         /*
1812          * There aren't any nodes below a peripheral node, so there's no
1813          * reason to descend the tree any further.
1814          */
1815         retval = DM_RET_STOP;
1816
1817         for (i = 0; i < num_patterns; i++) {
1818                 struct periph_match_pattern *cur_pattern;
1819
1820                 /*
1821                  * If the pattern in question isn't for a peripheral, we
1822                  * aren't interested.
1823                  */
1824                 if (patterns[i].type != DEV_MATCH_PERIPH)
1825                         continue;
1826
1827                 cur_pattern = &patterns[i].pattern.periph_pattern;
1828
1829                 /*
1830                  * If they want to match on anything, then we will do so.
1831                  */
1832                 if (cur_pattern->flags == PERIPH_MATCH_ANY) {
1833                         /* set the copy flag */
1834                         retval |= DM_RET_COPY;
1835
1836                         /*
1837                          * We've already set the return action to stop,
1838                          * since there are no nodes below peripherals in
1839                          * the tree.
1840                          */
1841                         return(retval);
1842                 }
1843
1844                 /*
1845                  * Not sure why someone would do this...
1846                  */
1847                 if (cur_pattern->flags == PERIPH_MATCH_NONE)
1848                         continue;
1849
1850                 if (((cur_pattern->flags & PERIPH_MATCH_PATH) != 0)
1851                  && (cur_pattern->path_id != periph->path->bus->path_id))
1852                         continue;
1853
1854                 /*
1855                  * For the target and lun id's, we have to make sure the
1856                  * target and lun pointers aren't NULL.  The xpt peripheral
1857                  * has a wildcard target and device.
1858                  */
1859                 if (((cur_pattern->flags & PERIPH_MATCH_TARGET) != 0)
1860                  && ((periph->path->target == NULL)
1861                  ||(cur_pattern->target_id != periph->path->target->target_id)))
1862                         continue;
1863
1864                 if (((cur_pattern->flags & PERIPH_MATCH_LUN) != 0)
1865                  && ((periph->path->device == NULL)
1866                  || (cur_pattern->target_lun != periph->path->device->lun_id)))
1867                         continue;
1868
1869                 if (((cur_pattern->flags & PERIPH_MATCH_UNIT) != 0)
1870                  && (cur_pattern->unit_number != periph->unit_number))
1871                         continue;
1872
1873                 if (((cur_pattern->flags & PERIPH_MATCH_NAME) != 0)
1874                  && (strncmp(cur_pattern->periph_name, periph->periph_name,
1875                              DEV_IDLEN) != 0))
1876                         continue;
1877
1878                 /*
1879                  * If we get to this point, the user definitely wants
1880                  * information on this peripheral.  So tell the caller to
1881                  * copy the data out.
1882                  */
1883                 retval |= DM_RET_COPY;
1884
1885                 /*
1886                  * The return action has already been set to stop, since
1887                  * peripherals don't have any nodes below them in the EDT.
1888                  */
1889                 return(retval);
1890         }
1891
1892         /*
1893          * If we get to this point, the peripheral that was passed in
1894          * doesn't match any of the patterns.
1895          */
1896         return(retval);
1897 }
1898
1899 static int
1900 xptedtbusfunc(struct cam_eb *bus, void *arg)
1901 {
1902         struct ccb_dev_match *cdm;
1903         dev_match_ret retval;
1904
1905         cdm = (struct ccb_dev_match *)arg;
1906
1907         /*
1908          * If our position is for something deeper in the tree, that means
1909          * that we've already seen this node.  So, we keep going down.
1910          */
1911         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1912          && (cdm->pos.cookie.bus == bus)
1913          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1914          && (cdm->pos.cookie.target != NULL))
1915                 retval = DM_RET_DESCEND;
1916         else
1917                 retval = xptbusmatch(cdm->patterns, cdm->num_patterns, bus);
1918
1919         /*
1920          * If we got an error, bail out of the search.
1921          */
1922         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
1923                 cdm->status = CAM_DEV_MATCH_ERROR;
1924                 return(0);
1925         }
1926
1927         /*
1928          * If the copy flag is set, copy this bus out.
1929          */
1930         if (retval & DM_RET_COPY) {
1931                 int spaceleft, j;
1932
1933                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
1934                         sizeof(struct dev_match_result));
1935
1936                 /*
1937                  * If we don't have enough space to put in another
1938                  * match result, save our position and tell the
1939                  * user there are more devices to check.
1940                  */
1941                 if (spaceleft < sizeof(struct dev_match_result)) {
1942                         bzero(&cdm->pos, sizeof(cdm->pos));
1943                         cdm->pos.position_type =
1944                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS;
1945
1946                         cdm->pos.cookie.bus = bus;
1947                         cdm->pos.generations[CAM_BUS_GENERATION]=
1948                                 bus_generation;
1949                         cdm->status = CAM_DEV_MATCH_MORE;
1950                         return(0);
1951                 }
1952                 j = cdm->num_matches;
1953                 cdm->num_matches++;
1954                 cdm->matches[j].type = DEV_MATCH_BUS;
1955                 cdm->matches[j].result.bus_result.path_id = bus->path_id;
1956                 cdm->matches[j].result.bus_result.bus_id = bus->sim->bus_id;
1957                 cdm->matches[j].result.bus_result.unit_number =
1958                         bus->sim->unit_number;
1959                 strncpy(cdm->matches[j].result.bus_result.dev_name,
1960                         bus->sim->sim_name, DEV_IDLEN);
1961         }
1962
1963         /*
1964          * If the user is only interested in busses, there's no
1965          * reason to descend to the next level in the tree.
1966          */
1967         if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
1968                 return(1);
1969
1970         /*
1971          * If there is a target generation recorded, check it to
1972          * make sure the target list hasn't changed.
1973          */
1974         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1975          && (bus == cdm->pos.cookie.bus)
1976          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1977          && (cdm->pos.generations[CAM_TARGET_GENERATION] != 0)
1978          && (cdm->pos.generations[CAM_TARGET_GENERATION] !=
1979              bus->generation)) {
1980                 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
1981                 return(0);
1982         }
1983
1984         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
1985          && (cdm->pos.cookie.bus == bus)
1986          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
1987          && (cdm->pos.cookie.target != NULL))
1988                 return(xpttargettraverse(bus,
1989                                         (struct cam_et *)cdm->pos.cookie.target,
1990                                          xptedttargetfunc, arg));
1991         else
1992                 return(xpttargettraverse(bus, NULL, xptedttargetfunc, arg));
1993 }
1994
1995 static int
1996 xptedttargetfunc(struct cam_et *target, void *arg)
1997 {
1998         struct ccb_dev_match *cdm;
1999
2000         cdm = (struct ccb_dev_match *)arg;
2001
2002         /*
2003          * If there is a device list generation recorded, check it to
2004          * make sure the device list hasn't changed.
2005          */
2006         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2007          && (cdm->pos.cookie.bus == target->bus)
2008          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2009          && (cdm->pos.cookie.target == target)
2010          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
2011          && (cdm->pos.generations[CAM_DEV_GENERATION] != 0)
2012          && (cdm->pos.generations[CAM_DEV_GENERATION] !=
2013              target->generation)) {
2014                 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2015                 return(0);
2016         }
2017
2018         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2019          && (cdm->pos.cookie.bus == target->bus)
2020          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2021          && (cdm->pos.cookie.target == target)
2022          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
2023          && (cdm->pos.cookie.device != NULL))
2024                 return(xptdevicetraverse(target,
2025                                         (struct cam_ed *)cdm->pos.cookie.device,
2026                                          xptedtdevicefunc, arg));
2027         else
2028                 return(xptdevicetraverse(target, NULL, xptedtdevicefunc, arg));
2029 }
2030
2031 static int
2032 xptedtdevicefunc(struct cam_ed *device, void *arg)
2033 {
2034
2035         struct ccb_dev_match *cdm;
2036         dev_match_ret retval;
2037
2038         cdm = (struct ccb_dev_match *)arg;
2039
2040         /*
2041          * If our position is for something deeper in the tree, that means
2042          * that we've already seen this node.  So, we keep going down.
2043          */
2044         if ((cdm->pos.position_type & CAM_DEV_POS_DEVICE)
2045          && (cdm->pos.cookie.device == device)
2046          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2047          && (cdm->pos.cookie.periph != NULL))
2048                 retval = DM_RET_DESCEND;
2049         else
2050                 retval = xptdevicematch(cdm->patterns, cdm->num_patterns,
2051                                         device);
2052
2053         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
2054                 cdm->status = CAM_DEV_MATCH_ERROR;
2055                 return(0);
2056         }
2057
2058         /*
2059          * If the copy flag is set, copy this device out.
2060          */
2061         if (retval & DM_RET_COPY) {
2062                 int spaceleft, j;
2063
2064                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
2065                         sizeof(struct dev_match_result));
2066
2067                 /*
2068                  * If we don't have enough space to put in another
2069                  * match result, save our position and tell the
2070                  * user there are more devices to check.
2071                  */
2072                 if (spaceleft < sizeof(struct dev_match_result)) {
2073                         bzero(&cdm->pos, sizeof(cdm->pos));
2074                         cdm->pos.position_type =
2075                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
2076                                 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE;
2077
2078                         cdm->pos.cookie.bus = device->target->bus;
2079                         cdm->pos.generations[CAM_BUS_GENERATION]=
2080                                 bus_generation;
2081                         cdm->pos.cookie.target = device->target;
2082                         cdm->pos.generations[CAM_TARGET_GENERATION] =
2083                                 device->target->bus->generation;
2084                         cdm->pos.cookie.device = device;
2085                         cdm->pos.generations[CAM_DEV_GENERATION] =
2086                                 device->target->generation;
2087                         cdm->status = CAM_DEV_MATCH_MORE;
2088                         return(0);
2089                 }
2090                 j = cdm->num_matches;
2091                 cdm->num_matches++;
2092                 cdm->matches[j].type = DEV_MATCH_DEVICE;
2093                 cdm->matches[j].result.device_result.path_id =
2094                         device->target->bus->path_id;
2095                 cdm->matches[j].result.device_result.target_id =
2096                         device->target->target_id;
2097                 cdm->matches[j].result.device_result.target_lun =
2098                         device->lun_id;
2099                 bcopy(&device->inq_data,
2100                       &cdm->matches[j].result.device_result.inq_data,
2101                       sizeof(struct scsi_inquiry_data));
2102
2103                 /* Let the user know whether this device is unconfigured */
2104                 if (device->flags & CAM_DEV_UNCONFIGURED)
2105                         cdm->matches[j].result.device_result.flags =
2106                                 DEV_RESULT_UNCONFIGURED;
2107                 else
2108                         cdm->matches[j].result.device_result.flags =
2109                                 DEV_RESULT_NOFLAG;
2110         }
2111
2112         /*
2113          * If the user isn't interested in peripherals, don't descend
2114          * the tree any further.
2115          */
2116         if ((retval & DM_RET_ACTION_MASK) == DM_RET_STOP)
2117                 return(1);
2118
2119         /*
2120          * If there is a peripheral list generation recorded, make sure
2121          * it hasn't changed.
2122          */
2123         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2124          && (device->target->bus == cdm->pos.cookie.bus)
2125          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2126          && (device->target == cdm->pos.cookie.target)
2127          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
2128          && (device == cdm->pos.cookie.device)
2129          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2130          && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0)
2131          && (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
2132              device->generation)){
2133                 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2134                 return(0);
2135         }
2136
2137         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2138          && (cdm->pos.cookie.bus == device->target->bus)
2139          && (cdm->pos.position_type & CAM_DEV_POS_TARGET)
2140          && (cdm->pos.cookie.target == device->target)
2141          && (cdm->pos.position_type & CAM_DEV_POS_DEVICE)
2142          && (cdm->pos.cookie.device == device)
2143          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2144          && (cdm->pos.cookie.periph != NULL))
2145                 return(xptperiphtraverse(device,
2146                                 (struct cam_periph *)cdm->pos.cookie.periph,
2147                                 xptedtperiphfunc, arg));
2148         else
2149                 return(xptperiphtraverse(device, NULL, xptedtperiphfunc, arg));
2150 }
2151
2152 static int
2153 xptedtperiphfunc(struct cam_periph *periph, void *arg)
2154 {
2155         struct ccb_dev_match *cdm;
2156         dev_match_ret retval;
2157
2158         cdm = (struct ccb_dev_match *)arg;
2159
2160         retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
2161
2162         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
2163                 cdm->status = CAM_DEV_MATCH_ERROR;
2164                 return(0);
2165         }
2166
2167         /*
2168          * If the copy flag is set, copy this peripheral out.
2169          */
2170         if (retval & DM_RET_COPY) {
2171                 int spaceleft, j;
2172
2173                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
2174                         sizeof(struct dev_match_result));
2175
2176                 /*
2177                  * If we don't have enough space to put in another
2178                  * match result, save our position and tell the
2179                  * user there are more devices to check.
2180                  */
2181                 if (spaceleft < sizeof(struct dev_match_result)) {
2182                         bzero(&cdm->pos, sizeof(cdm->pos));
2183                         cdm->pos.position_type =
2184                                 CAM_DEV_POS_EDT | CAM_DEV_POS_BUS |
2185                                 CAM_DEV_POS_TARGET | CAM_DEV_POS_DEVICE |
2186                                 CAM_DEV_POS_PERIPH;
2187
2188                         cdm->pos.cookie.bus = periph->path->bus;
2189                         cdm->pos.generations[CAM_BUS_GENERATION]=
2190                                 bus_generation;
2191                         cdm->pos.cookie.target = periph->path->target;
2192                         cdm->pos.generations[CAM_TARGET_GENERATION] =
2193                                 periph->path->bus->generation;
2194                         cdm->pos.cookie.device = periph->path->device;
2195                         cdm->pos.generations[CAM_DEV_GENERATION] =
2196                                 periph->path->target->generation;
2197                         cdm->pos.cookie.periph = periph;
2198                         cdm->pos.generations[CAM_PERIPH_GENERATION] =
2199                                 periph->path->device->generation;
2200                         cdm->status = CAM_DEV_MATCH_MORE;
2201                         return(0);
2202                 }
2203
2204                 j = cdm->num_matches;
2205                 cdm->num_matches++;
2206                 cdm->matches[j].type = DEV_MATCH_PERIPH;
2207                 cdm->matches[j].result.periph_result.path_id =
2208                         periph->path->bus->path_id;
2209                 cdm->matches[j].result.periph_result.target_id =
2210                         periph->path->target->target_id;
2211                 cdm->matches[j].result.periph_result.target_lun =
2212                         periph->path->device->lun_id;
2213                 cdm->matches[j].result.periph_result.unit_number =
2214                         periph->unit_number;
2215                 strncpy(cdm->matches[j].result.periph_result.periph_name,
2216                         periph->periph_name, DEV_IDLEN);
2217         }
2218
2219         return(1);
2220 }
2221
2222 static int
2223 xptedtmatch(struct ccb_dev_match *cdm)
2224 {
2225         int ret;
2226
2227         cdm->num_matches = 0;
2228
2229         /*
2230          * Check the bus list generation.  If it has changed, the user
2231          * needs to reset everything and start over.
2232          */
2233         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2234          && (cdm->pos.generations[CAM_BUS_GENERATION] != 0)
2235          && (cdm->pos.generations[CAM_BUS_GENERATION] != bus_generation)) {
2236                 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2237                 return(0);
2238         }
2239
2240         if ((cdm->pos.position_type & CAM_DEV_POS_BUS)
2241          && (cdm->pos.cookie.bus != NULL))
2242                 ret = xptbustraverse((struct cam_eb *)cdm->pos.cookie.bus,
2243                                      xptedtbusfunc, cdm);
2244         else
2245                 ret = xptbustraverse(NULL, xptedtbusfunc, cdm);
2246
2247         /*
2248          * If we get back 0, that means that we had to stop before fully
2249          * traversing the EDT.  It also means that one of the subroutines
2250          * has set the status field to the proper value.  If we get back 1,
2251          * we've fully traversed the EDT and copied out any matching entries.
2252          */
2253         if (ret == 1)
2254                 cdm->status = CAM_DEV_MATCH_LAST;
2255
2256         return(ret);
2257 }
2258
2259 static int
2260 xptplistpdrvfunc(struct periph_driver **pdrv, void *arg)
2261 {
2262         struct ccb_dev_match *cdm;
2263
2264         cdm = (struct ccb_dev_match *)arg;
2265
2266         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2267          && (cdm->pos.cookie.pdrv == pdrv)
2268          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2269          && (cdm->pos.generations[CAM_PERIPH_GENERATION] != 0)
2270          && (cdm->pos.generations[CAM_PERIPH_GENERATION] !=
2271              (*pdrv)->generation)) {
2272                 cdm->status = CAM_DEV_MATCH_LIST_CHANGED;
2273                 return(0);
2274         }
2275
2276         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2277          && (cdm->pos.cookie.pdrv == pdrv)
2278          && (cdm->pos.position_type & CAM_DEV_POS_PERIPH)
2279          && (cdm->pos.cookie.periph != NULL))
2280                 return(xptpdperiphtraverse(pdrv,
2281                                 (struct cam_periph *)cdm->pos.cookie.periph,
2282                                 xptplistperiphfunc, arg));
2283         else
2284                 return(xptpdperiphtraverse(pdrv, NULL,xptplistperiphfunc, arg));
2285 }
2286
2287 static int
2288 xptplistperiphfunc(struct cam_periph *periph, void *arg)
2289 {
2290         struct ccb_dev_match *cdm;
2291         dev_match_ret retval;
2292
2293         cdm = (struct ccb_dev_match *)arg;
2294
2295         retval = xptperiphmatch(cdm->patterns, cdm->num_patterns, periph);
2296
2297         if ((retval & DM_RET_ACTION_MASK) == DM_RET_ERROR) {
2298                 cdm->status = CAM_DEV_MATCH_ERROR;
2299                 return(0);
2300         }
2301
2302         /*
2303          * If the copy flag is set, copy this peripheral out.
2304          */
2305         if (retval & DM_RET_COPY) {
2306                 int spaceleft, j;
2307
2308                 spaceleft = cdm->match_buf_len - (cdm->num_matches *
2309                         sizeof(struct dev_match_result));
2310
2311                 /*
2312                  * If we don't have enough space to put in another
2313                  * match result, save our position and tell the
2314                  * user there are more devices to check.
2315                  */
2316                 if (spaceleft < sizeof(struct dev_match_result)) {
2317                         struct periph_driver **pdrv;
2318
2319                         pdrv = NULL;
2320                         bzero(&cdm->pos, sizeof(cdm->pos));
2321                         cdm->pos.position_type =
2322                                 CAM_DEV_POS_PDRV | CAM_DEV_POS_PDPTR |
2323                                 CAM_DEV_POS_PERIPH;
2324
2325                         /*
2326                          * This may look a bit non-sensical, but it is
2327                          * actually quite logical.  There are very few
2328                          * peripheral drivers, and bloating every peripheral
2329                          * structure with a pointer back to its parent
2330                          * peripheral driver linker set entry would cost
2331                          * more in the long run than doing this quick lookup.
2332                          */
2333                         SET_FOREACH(pdrv, periphdriver_set) {
2334                                 if (strcmp((*pdrv)->driver_name,
2335                                     periph->periph_name) == 0)
2336                                         break;
2337                         }
2338
2339                         if (pdrv == NULL) {
2340                                 cdm->status = CAM_DEV_MATCH_ERROR;
2341                                 return(0);
2342                         }
2343
2344                         cdm->pos.cookie.pdrv = pdrv;
2345                         /*
2346                          * The periph generation slot does double duty, as
2347                          * does the periph pointer slot.  They are used for
2348                          * both edt and pdrv lookups and positioning.
2349                          */
2350                         cdm->pos.cookie.periph = periph;
2351                         cdm->pos.generations[CAM_PERIPH_GENERATION] =
2352                                 (*pdrv)->generation;
2353                         cdm->status = CAM_DEV_MATCH_MORE;
2354                         return(0);
2355                 }
2356
2357                 j = cdm->num_matches;
2358                 cdm->num_matches++;
2359                 cdm->matches[j].type = DEV_MATCH_PERIPH;
2360                 cdm->matches[j].result.periph_result.path_id =
2361                         periph->path->bus->path_id;
2362
2363                 /*
2364                  * The transport layer peripheral doesn't have a target or
2365                  * lun.
2366                  */
2367                 if (periph->path->target)
2368                         cdm->matches[j].result.periph_result.target_id =
2369                                 periph->path->target->target_id;
2370                 else
2371                         cdm->matches[j].result.periph_result.target_id = -1;
2372
2373                 if (periph->path->device)
2374                         cdm->matches[j].result.periph_result.target_lun =
2375                                 periph->path->device->lun_id;
2376                 else
2377                         cdm->matches[j].result.periph_result.target_lun = -1;
2378
2379                 cdm->matches[j].result.periph_result.unit_number =
2380                         periph->unit_number;
2381                 strncpy(cdm->matches[j].result.periph_result.periph_name,
2382                         periph->periph_name, DEV_IDLEN);
2383         }
2384
2385         return(1);
2386 }
2387
2388 static int
2389 xptperiphlistmatch(struct ccb_dev_match *cdm)
2390 {
2391         int ret;
2392
2393         cdm->num_matches = 0;
2394
2395         /*
2396          * At this point in the edt traversal function, we check the bus
2397          * list generation to make sure that no busses have been added or
2398          * removed since the user last sent a XPT_DEV_MATCH ccb through.
2399          * For the peripheral driver list traversal function, however, we
2400          * don't have to worry about new peripheral driver types coming or
2401          * going; they're in a linker set, and therefore can't change
2402          * without a recompile.
2403          */
2404
2405         if ((cdm->pos.position_type & CAM_DEV_POS_PDPTR)
2406          && (cdm->pos.cookie.pdrv != NULL))
2407                 ret = xptpdrvtraverse(
2408                                 (struct periph_driver **)cdm->pos.cookie.pdrv,
2409                                 xptplistpdrvfunc, cdm);
2410         else
2411                 ret = xptpdrvtraverse(NULL, xptplistpdrvfunc, cdm);
2412
2413         /*
2414          * If we get back 0, that means that we had to stop before fully
2415          * traversing the peripheral driver tree.  It also means that one of
2416          * the subroutines has set the status field to the proper value.  If
2417          * we get back 1, we've fully traversed the EDT and copied out any
2418          * matching entries.
2419          */
2420         if (ret == 1)
2421                 cdm->status = CAM_DEV_MATCH_LAST;
2422
2423         return(ret);
2424 }
2425
2426 static int
2427 xptbustraverse(struct cam_eb *start_bus, xpt_busfunc_t *tr_func, void *arg)
2428 {
2429         struct cam_eb *bus, *next_bus;
2430         int retval;
2431
2432         retval = 1;
2433
2434         for (bus = (start_bus ? start_bus : TAILQ_FIRST(&xpt_busses));
2435              bus != NULL;
2436              bus = next_bus) {
2437                 next_bus = TAILQ_NEXT(bus, links);
2438
2439                 retval = tr_func(bus, arg);
2440                 if (retval == 0)
2441                         return(retval);
2442         }
2443
2444         return(retval);
2445 }
2446
2447 static int
2448 xpttargettraverse(struct cam_eb *bus, struct cam_et *start_target,
2449                   xpt_targetfunc_t *tr_func, void *arg)
2450 {
2451         struct cam_et *target, *next_target;
2452         int retval;
2453
2454         retval = 1;
2455         for (target = (start_target ? start_target :
2456                        TAILQ_FIRST(&bus->et_entries));
2457              target != NULL; target = next_target) {
2458
2459                 next_target = TAILQ_NEXT(target, links);
2460
2461                 retval = tr_func(target, arg);
2462
2463                 if (retval == 0)
2464                         return(retval);
2465         }
2466
2467         return(retval);
2468 }
2469
2470 static int
2471 xptdevicetraverse(struct cam_et *target, struct cam_ed *start_device,
2472                   xpt_devicefunc_t *tr_func, void *arg)
2473 {
2474         struct cam_ed *device, *next_device;
2475         int retval;
2476
2477         retval = 1;
2478         for (device = (start_device ? start_device :
2479                        TAILQ_FIRST(&target->ed_entries));
2480              device != NULL;
2481              device = next_device) {
2482
2483                 next_device = TAILQ_NEXT(device, links);
2484
2485                 retval = tr_func(device, arg);
2486
2487                 if (retval == 0)
2488                         return(retval);
2489         }
2490
2491         return(retval);
2492 }
2493
2494 static int
2495 xptperiphtraverse(struct cam_ed *device, struct cam_periph *start_periph,
2496                   xpt_periphfunc_t *tr_func, void *arg)
2497 {
2498         struct cam_periph *periph, *next_periph;
2499         int retval;
2500
2501         retval = 1;
2502
2503         for (periph = (start_periph ? start_periph :
2504                        SLIST_FIRST(&device->periphs));
2505              periph != NULL;
2506              periph = next_periph) {
2507
2508                 next_periph = SLIST_NEXT(periph, periph_links);
2509
2510                 retval = tr_func(periph, arg);
2511                 if (retval == 0)
2512                         return(retval);
2513         }
2514
2515         return(retval);
2516 }
2517
2518 static int
2519 xptpdrvtraverse(struct periph_driver **start_pdrv,
2520                 xpt_pdrvfunc_t *tr_func, void *arg)
2521 {
2522         struct periph_driver **pdrv;
2523         int retval;
2524
2525         retval = 1;
2526
2527         /*
2528          * We don't traverse the peripheral driver list like we do the
2529          * other lists, because it is a linker set, and therefore cannot be
2530          * changed during runtime.  If the peripheral driver list is ever
2531          * re-done to be something other than a linker set (i.e. it can
2532          * change while the system is running), the list traversal should
2533          * be modified to work like the other traversal functions.
2534          */
2535         SET_FOREACH(pdrv, periphdriver_set) {
2536                 if (start_pdrv == NULL || start_pdrv == pdrv) {
2537                         retval = tr_func(pdrv, arg);
2538                         if (retval == 0)
2539                                 return(retval);
2540                         start_pdrv = NULL; /* traverse remainder */
2541                 }
2542         }
2543         return(retval);
2544 }
2545
2546 static int
2547 xptpdperiphtraverse(struct periph_driver **pdrv,
2548                     struct cam_periph *start_periph,
2549                     xpt_periphfunc_t *tr_func, void *arg)
2550 {
2551         struct cam_periph *periph, *next_periph;
2552         int retval;
2553
2554         retval = 1;
2555
2556         for (periph = (start_periph ? start_periph :
2557              TAILQ_FIRST(&(*pdrv)->units)); periph != NULL;
2558              periph = next_periph) {
2559
2560                 next_periph = TAILQ_NEXT(periph, unit_links);
2561
2562                 retval = tr_func(periph, arg);
2563                 if (retval == 0)
2564                         return(retval);
2565         }
2566         return(retval);
2567 }
2568
2569 static int
2570 xptdefbusfunc(struct cam_eb *bus, void *arg)
2571 {
2572         struct xpt_traverse_config *tr_config;
2573
2574         tr_config = (struct xpt_traverse_config *)arg;
2575
2576         if (tr_config->depth == XPT_DEPTH_BUS) {
2577                 xpt_busfunc_t *tr_func;
2578
2579                 tr_func = (xpt_busfunc_t *)tr_config->tr_func;
2580
2581                 return(tr_func(bus, tr_config->tr_arg));
2582         } else
2583                 return(xpttargettraverse(bus, NULL, xptdeftargetfunc, arg));
2584 }
2585
2586 static int
2587 xptdeftargetfunc(struct cam_et *target, void *arg)
2588 {
2589         struct xpt_traverse_config *tr_config;
2590
2591         tr_config = (struct xpt_traverse_config *)arg;
2592
2593         if (tr_config->depth == XPT_DEPTH_TARGET) {
2594                 xpt_targetfunc_t *tr_func;
2595
2596                 tr_func = (xpt_targetfunc_t *)tr_config->tr_func;
2597
2598                 return(tr_func(target, tr_config->tr_arg));
2599         } else
2600                 return(xptdevicetraverse(target, NULL, xptdefdevicefunc, arg));
2601 }
2602
2603 static int
2604 xptdefdevicefunc(struct cam_ed *device, void *arg)
2605 {
2606         struct xpt_traverse_config *tr_config;
2607
2608         tr_config = (struct xpt_traverse_config *)arg;
2609
2610         if (tr_config->depth == XPT_DEPTH_DEVICE) {
2611                 xpt_devicefunc_t *tr_func;
2612
2613                 tr_func = (xpt_devicefunc_t *)tr_config->tr_func;
2614
2615                 return(tr_func(device, tr_config->tr_arg));
2616         } else
2617                 return(xptperiphtraverse(device, NULL, xptdefperiphfunc, arg));
2618 }
2619
2620 static int
2621 xptdefperiphfunc(struct cam_periph *periph, void *arg)
2622 {
2623         struct xpt_traverse_config *tr_config;
2624         xpt_periphfunc_t *tr_func;
2625
2626         tr_config = (struct xpt_traverse_config *)arg;
2627
2628         tr_func = (xpt_periphfunc_t *)tr_config->tr_func;
2629
2630         /*
2631          * Unlike the other default functions, we don't check for depth
2632          * here.  The peripheral driver level is the last level in the EDT,
2633          * so if we're here, we should execute the function in question.
2634          */
2635         return(tr_func(periph, tr_config->tr_arg));
2636 }
2637
2638 /*
2639  * Execute the given function for every bus in the EDT.
2640  */
2641 static int
2642 xpt_for_all_busses(xpt_busfunc_t *tr_func, void *arg)
2643 {
2644         struct xpt_traverse_config tr_config;
2645
2646         tr_config.depth = XPT_DEPTH_BUS;
2647         tr_config.tr_func = tr_func;
2648         tr_config.tr_arg = arg;
2649
2650         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2651 }
2652
2653 #ifdef notusedyet
2654 /*
2655  * Execute the given function for every target in the EDT.
2656  */
2657 static int
2658 xpt_for_all_targets(xpt_targetfunc_t *tr_func, void *arg)
2659 {
2660         struct xpt_traverse_config tr_config;
2661
2662         tr_config.depth = XPT_DEPTH_TARGET;
2663         tr_config.tr_func = tr_func;
2664         tr_config.tr_arg = arg;
2665
2666         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2667 }
2668 #endif /* notusedyet */
2669
2670 /*
2671  * Execute the given function for every device in the EDT.
2672  */
2673 static int
2674 xpt_for_all_devices(xpt_devicefunc_t *tr_func, void *arg)
2675 {
2676         struct xpt_traverse_config tr_config;
2677
2678         tr_config.depth = XPT_DEPTH_DEVICE;
2679         tr_config.tr_func = tr_func;
2680         tr_config.tr_arg = arg;
2681
2682         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2683 }
2684
2685 #ifdef notusedyet
2686 /*
2687  * Execute the given function for every peripheral in the EDT.
2688  */
2689 static int
2690 xpt_for_all_periphs(xpt_periphfunc_t *tr_func, void *arg)
2691 {
2692         struct xpt_traverse_config tr_config;
2693
2694         tr_config.depth = XPT_DEPTH_PERIPH;
2695         tr_config.tr_func = tr_func;
2696         tr_config.tr_arg = arg;
2697
2698         return(xptbustraverse(NULL, xptdefbusfunc, &tr_config));
2699 }
2700 #endif /* notusedyet */
2701
2702 static int
2703 xptsetasyncfunc(struct cam_ed *device, void *arg)
2704 {
2705         struct cam_path path;
2706         struct ccb_getdev cgd;
2707         struct async_node *cur_entry;
2708
2709         cur_entry = (struct async_node *)arg;
2710
2711         /*
2712          * Don't report unconfigured devices (Wildcard devs,
2713          * devices only for target mode, device instances
2714          * that have been invalidated but are waiting for
2715          * their last reference count to be released).
2716          */
2717         if ((device->flags & CAM_DEV_UNCONFIGURED) != 0)
2718                 return (1);
2719
2720         xpt_compile_path(&path,
2721                          NULL,
2722                          device->target->bus->path_id,
2723                          device->target->target_id,
2724                          device->lun_id);
2725         xpt_setup_ccb(&cgd.ccb_h, &path, /*priority*/1);
2726         cgd.ccb_h.func_code = XPT_GDEV_TYPE;
2727         xpt_action((union ccb *)&cgd);
2728         cur_entry->callback(cur_entry->callback_arg,
2729                             AC_FOUND_DEVICE,
2730                             &path, &cgd);
2731         xpt_release_path(&path);
2732
2733         return(1);
2734 }
2735
2736 static int
2737 xptsetasyncbusfunc(struct cam_eb *bus, void *arg)
2738 {
2739         struct cam_path path;
2740         struct ccb_pathinq cpi;
2741         struct async_node *cur_entry;
2742
2743         cur_entry = (struct async_node *)arg;
2744
2745         xpt_compile_path(&path, /*periph*/NULL,
2746                          bus->sim->path_id,
2747                          CAM_TARGET_WILDCARD,
2748                          CAM_LUN_WILDCARD);
2749         xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1);
2750         cpi.ccb_h.func_code = XPT_PATH_INQ;
2751         xpt_action((union ccb *)&cpi);
2752         cur_entry->callback(cur_entry->callback_arg,
2753                             AC_PATH_REGISTERED,
2754                             &path, &cpi);
2755         xpt_release_path(&path);
2756
2757         return(1);
2758 }
2759
2760 void
2761 xpt_action(union ccb *start_ccb)
2762 {
2763         int iopl;
2764
2765         CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_action\n"));
2766
2767         start_ccb->ccb_h.status = CAM_REQ_INPROG;
2768
2769         iopl = splsoftcam();
2770         switch (start_ccb->ccb_h.func_code) {
2771         case XPT_SCSI_IO:
2772         {
2773 #ifdef CAMDEBUG
2774                 char cdb_str[(SCSI_MAX_CDBLEN * 3) + 1];
2775                 struct cam_path *path;
2776
2777                 path = start_ccb->ccb_h.path;
2778 #endif
2779
2780                 /*
2781                  * For the sake of compatibility with SCSI-1
2782                  * devices that may not understand the identify
2783                  * message, we include lun information in the
2784                  * second byte of all commands.  SCSI-1 specifies
2785                  * that luns are a 3 bit value and reserves only 3
2786                  * bits for lun information in the CDB.  Later
2787                  * revisions of the SCSI spec allow for more than 8
2788                  * luns, but have deprecated lun information in the
2789                  * CDB.  So, if the lun won't fit, we must omit.
2790                  *
2791                  * Also be aware that during initial probing for devices,
2792                  * the inquiry information is unknown but initialized to 0.
2793                  * This means that this code will be exercised while probing
2794                  * devices with an ANSI revision greater than 2.
2795                  */
2796                 if (SID_ANSI_REV(&start_ccb->ccb_h.path->device->inq_data) <= 2
2797                  && start_ccb->ccb_h.target_lun < 8
2798                  && (start_ccb->ccb_h.flags & CAM_CDB_POINTER) == 0) {
2799
2800                         start_ccb->csio.cdb_io.cdb_bytes[1] |=
2801                             start_ccb->ccb_h.target_lun << 5;
2802                 }
2803                 start_ccb->csio.scsi_status = SCSI_STATUS_OK;
2804                 CAM_DEBUG(path, CAM_DEBUG_CDB,("%s. CDB: %s\n",
2805                           scsi_op_desc(start_ccb->csio.cdb_io.cdb_bytes[0],
2806                                        &path->device->inq_data),
2807                           scsi_cdb_string(start_ccb->csio.cdb_io.cdb_bytes,
2808                                           cdb_str, sizeof(cdb_str))));
2809                 /* FALLTHROUGH */
2810         }
2811         case XPT_TARGET_IO:
2812         case XPT_CONT_TARGET_IO:
2813                 start_ccb->csio.sense_resid = 0;
2814                 start_ccb->csio.resid = 0;
2815                 /* FALLTHROUGH */
2816         case XPT_RESET_DEV:
2817         case XPT_ENG_EXEC:
2818         {
2819                 struct cam_path *path;
2820                 int s;
2821                 int runq;
2822
2823                 path = start_ccb->ccb_h.path;
2824                 s = splsoftcam();
2825
2826                 cam_ccbq_insert_ccb(&path->device->ccbq, start_ccb);
2827                 if (path->device->qfrozen_cnt == 0)
2828                         runq = xpt_schedule_dev_sendq(path->bus, path->device);
2829                 else
2830                         runq = 0;
2831                 splx(s);
2832                 if (runq != 0)
2833                         xpt_run_dev_sendq(path->bus);
2834                 break;
2835         }
2836         case XPT_SET_TRAN_SETTINGS:
2837         {
2838                 xpt_set_transfer_settings(&start_ccb->cts,
2839                                           start_ccb->ccb_h.path->device,
2840                                           /*async_update*/FALSE);
2841                 break;
2842         }
2843         case XPT_CALC_GEOMETRY:
2844         {
2845                 struct cam_sim *sim;
2846
2847                 /* Filter out garbage */
2848                 if (start_ccb->ccg.block_size == 0
2849                  || start_ccb->ccg.volume_size == 0) {
2850                         start_ccb->ccg.cylinders = 0;
2851                         start_ccb->ccg.heads = 0;
2852                         start_ccb->ccg.secs_per_track = 0;
2853                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2854                         break;
2855                 }
2856 #ifdef PC98
2857                 /*
2858                  * In a PC-98 system, geometry translation depens on
2859                  * the "real" device geometry obtained from mode page 4.
2860                  * SCSI geometry translation is performed in the
2861                  * initialization routine of the SCSI BIOS and the result
2862                  * stored in host memory.  If the translation is available
2863                  * in host memory, use it.  If not, rely on the default
2864                  * translation the device driver performs.
2865                  */
2866                 if (scsi_da_bios_params(&start_ccb->ccg) != 0) {
2867                         start_ccb->ccb_h.status = CAM_REQ_CMP;
2868                         break;
2869                 }
2870 #endif
2871                 sim = start_ccb->ccb_h.path->bus->sim;
2872                 (*(sim->sim_action))(sim, start_ccb);
2873                 break;
2874         }
2875         case XPT_ABORT:
2876         {
2877                 union ccb* abort_ccb;
2878                 int s;
2879
2880                 abort_ccb = start_ccb->cab.abort_ccb;
2881                 if (XPT_FC_IS_DEV_QUEUED(abort_ccb)) {
2882
2883                         if (abort_ccb->ccb_h.pinfo.index >= 0) {
2884                                 struct cam_ccbq *ccbq;
2885
2886                                 ccbq = &abort_ccb->ccb_h.path->device->ccbq;
2887                                 cam_ccbq_remove_ccb(ccbq, abort_ccb);
2888                                 abort_ccb->ccb_h.status =
2889                                     CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2890                                 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
2891                                 s = splcam();
2892                                 xpt_done(abort_ccb);
2893                                 splx(s);
2894                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2895                                 break;
2896                         }
2897                         if (abort_ccb->ccb_h.pinfo.index == CAM_UNQUEUED_INDEX
2898                          && (abort_ccb->ccb_h.status & CAM_SIM_QUEUED) == 0) {
2899                                 /*
2900                                  * We've caught this ccb en route to
2901                                  * the SIM.  Flag it for abort and the
2902                                  * SIM will do so just before starting
2903                                  * real work on the CCB.
2904                                  */
2905                                 abort_ccb->ccb_h.status =
2906                                     CAM_REQ_ABORTED|CAM_DEV_QFRZN;
2907                                 xpt_freeze_devq(abort_ccb->ccb_h.path, 1);
2908                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2909                                 break;
2910                         }
2911                 }
2912                 if (XPT_FC_IS_QUEUED(abort_ccb)
2913                  && (abort_ccb->ccb_h.pinfo.index == CAM_DONEQ_INDEX)) {
2914                         /*
2915                          * It's already completed but waiting
2916                          * for our SWI to get to it.
2917                          */
2918                         start_ccb->ccb_h.status = CAM_UA_ABORT;
2919                         break;
2920                 }
2921                 /*
2922                  * If we weren't able to take care of the abort request
2923                  * in the XPT, pass the request down to the SIM for processing.
2924                  */
2925                 /* FALLTHROUGH */
2926         }
2927         case XPT_ACCEPT_TARGET_IO:
2928         case XPT_EN_LUN:
2929         case XPT_IMMED_NOTIFY:
2930         case XPT_NOTIFY_ACK:
2931         case XPT_GET_TRAN_SETTINGS:
2932         case XPT_RESET_BUS:
2933         {
2934                 struct cam_sim *sim;
2935
2936                 sim = start_ccb->ccb_h.path->bus->sim;
2937                 (*(sim->sim_action))(sim, start_ccb);
2938                 break;
2939         }
2940         case XPT_PATH_INQ:
2941         {
2942                 struct cam_sim *sim;
2943
2944                 sim = start_ccb->ccb_h.path->bus->sim;
2945                 (*(sim->sim_action))(sim, start_ccb);
2946                 break;
2947         }
2948         case XPT_PATH_STATS:
2949                 start_ccb->cpis.last_reset =
2950                         start_ccb->ccb_h.path->bus->last_reset;
2951                 start_ccb->ccb_h.status = CAM_REQ_CMP;
2952                 break;
2953         case XPT_GDEV_TYPE:
2954         {
2955                 struct cam_ed *dev;
2956                 int s;
2957
2958                 dev = start_ccb->ccb_h.path->device;
2959                 s = splcam();
2960                 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
2961                         start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
2962                 } else {
2963                         struct ccb_getdev *cgd;
2964                         struct cam_eb *bus;
2965                         struct cam_et *tar;
2966
2967                         cgd = &start_ccb->cgd;
2968                         bus = cgd->ccb_h.path->bus;
2969                         tar = cgd->ccb_h.path->target;
2970                         cgd->inq_data = dev->inq_data;
2971                         cgd->ccb_h.status = CAM_REQ_CMP;
2972                         cgd->serial_num_len = dev->serial_num_len;
2973                         if ((dev->serial_num_len > 0)
2974                          && (dev->serial_num != NULL))
2975                                 bcopy(dev->serial_num, cgd->serial_num,
2976                                       dev->serial_num_len);
2977                 }
2978                 splx(s);
2979                 break;
2980         }
2981         case XPT_GDEV_STATS:
2982         {
2983                 struct cam_ed *dev;
2984                 int s;
2985
2986                 dev = start_ccb->ccb_h.path->device;
2987                 s = splcam();
2988                 if ((dev->flags & CAM_DEV_UNCONFIGURED) != 0) {
2989                         start_ccb->ccb_h.status = CAM_DEV_NOT_THERE;
2990                 } else {
2991                         struct ccb_getdevstats *cgds;
2992                         struct cam_eb *bus;
2993                         struct cam_et *tar;
2994
2995                         cgds = &start_ccb->cgds;
2996                         bus = cgds->ccb_h.path->bus;
2997                         tar = cgds->ccb_h.path->target;
2998                         cgds->dev_openings = dev->ccbq.dev_openings;
2999                         cgds->dev_active = dev->ccbq.dev_active;
3000                         cgds->devq_openings = dev->ccbq.devq_openings;
3001                         cgds->devq_queued = dev->ccbq.queue.entries;
3002                         cgds->held = dev->ccbq.held;
3003                         cgds->last_reset = tar->last_reset;
3004                         cgds->maxtags = dev->quirk->maxtags;
3005                         cgds->mintags = dev->quirk->mintags;
3006                         if (timevalcmp(&tar->last_reset, &bus->last_reset, <))
3007                                 cgds->last_reset = bus->last_reset;
3008                         cgds->ccb_h.status = CAM_REQ_CMP;
3009                 }
3010                 splx(s);
3011                 break;
3012         }
3013         case XPT_GDEVLIST:
3014         {
3015                 struct cam_periph       *nperiph;
3016                 struct periph_list      *periph_head;
3017                 struct ccb_getdevlist   *cgdl;
3018                 int                     i;
3019                 int                     s;
3020                 struct cam_ed           *device;
3021                 int                     found;
3022
3023
3024                 found = 0;
3025
3026                 /*
3027                  * Don't want anyone mucking with our data.
3028                  */
3029                 s = splcam();
3030                 device = start_ccb->ccb_h.path->device;
3031                 periph_head = &device->periphs;
3032                 cgdl = &start_ccb->cgdl;
3033
3034                 /*
3035                  * Check and see if the list has changed since the user
3036                  * last requested a list member.  If so, tell them that the
3037                  * list has changed, and therefore they need to start over
3038                  * from the beginning.
3039                  */
3040                 if ((cgdl->index != 0) &&
3041                     (cgdl->generation != device->generation)) {
3042                         cgdl->status = CAM_GDEVLIST_LIST_CHANGED;
3043                         splx(s);
3044                         break;
3045                 }
3046
3047                 /*
3048                  * Traverse the list of peripherals and attempt to find
3049                  * the requested peripheral.
3050                  */
3051                 for (nperiph = periph_head->slh_first, i = 0;
3052                      (nperiph != NULL) && (i <= cgdl->index);
3053                      nperiph = nperiph->periph_links.sle_next, i++) {
3054                         if (i == cgdl->index) {
3055                                 strncpy(cgdl->periph_name,
3056                                         nperiph->periph_name,
3057                                         DEV_IDLEN);
3058                                 cgdl->unit_number = nperiph->unit_number;
3059                                 found = 1;
3060                         }
3061                 }
3062                 if (found == 0) {
3063                         cgdl->status = CAM_GDEVLIST_ERROR;
3064                         splx(s);
3065                         break;
3066                 }
3067
3068                 if (nperiph == NULL)
3069                         cgdl->status = CAM_GDEVLIST_LAST_DEVICE;
3070                 else
3071                         cgdl->status = CAM_GDEVLIST_MORE_DEVS;
3072
3073                 cgdl->index++;
3074                 cgdl->generation = device->generation;
3075
3076                 splx(s);
3077                 cgdl->ccb_h.status = CAM_REQ_CMP;
3078                 break;
3079         }
3080         case XPT_DEV_MATCH:
3081         {
3082                 int s;
3083                 dev_pos_type position_type;
3084                 struct ccb_dev_match *cdm;
3085                 int ret;
3086
3087                 cdm = &start_ccb->cdm;
3088
3089                 /*
3090                  * Prevent EDT changes while we traverse it.
3091                  */
3092                 s = splcam();
3093                 /*
3094                  * There are two ways of getting at information in the EDT.
3095                  * The first way is via the primary EDT tree.  It starts
3096                  * with a list of busses, then a list of targets on a bus,
3097                  * then devices/luns on a target, and then peripherals on a
3098                  * device/lun.  The "other" way is by the peripheral driver
3099                  * lists.  The peripheral driver lists are organized by
3100                  * peripheral driver.  (obviously)  So it makes sense to
3101                  * use the peripheral driver list if the user is looking
3102                  * for something like "da1", or all "da" devices.  If the
3103                  * user is looking for something on a particular bus/target
3104                  * or lun, it's generally better to go through the EDT tree.
3105                  */
3106
3107                 if (cdm->pos.position_type != CAM_DEV_POS_NONE)
3108                         position_type = cdm->pos.position_type;
3109                 else {
3110                         int i;
3111
3112                         position_type = CAM_DEV_POS_NONE;
3113
3114                         for (i = 0; i < cdm->num_patterns; i++) {
3115                                 if ((cdm->patterns[i].type == DEV_MATCH_BUS)
3116                                  ||(cdm->patterns[i].type == DEV_MATCH_DEVICE)){
3117                                         position_type = CAM_DEV_POS_EDT;
3118                                         break;
3119                                 }
3120                         }
3121
3122                         if (cdm->num_patterns == 0)
3123                                 position_type = CAM_DEV_POS_EDT;
3124                         else if (position_type == CAM_DEV_POS_NONE)
3125                                 position_type = CAM_DEV_POS_PDRV;
3126                 }
3127
3128                 switch(position_type & CAM_DEV_POS_TYPEMASK) {
3129                 case CAM_DEV_POS_EDT:
3130                         ret = xptedtmatch(cdm);
3131                         break;
3132                 case CAM_DEV_POS_PDRV:
3133                         ret = xptperiphlistmatch(cdm);
3134                         break;
3135                 default:
3136                         cdm->status = CAM_DEV_MATCH_ERROR;
3137                         break;
3138                 }
3139
3140                 splx(s);
3141
3142                 if (cdm->status == CAM_DEV_MATCH_ERROR)
3143                         start_ccb->ccb_h.status = CAM_REQ_CMP_ERR;
3144                 else
3145                         start_ccb->ccb_h.status = CAM_REQ_CMP;
3146
3147                 break;
3148         }
3149         case XPT_SASYNC_CB:
3150         {
3151                 struct ccb_setasync *csa;
3152                 struct async_node *cur_entry;
3153                 struct async_list *async_head;
3154                 u_int32_t added;
3155                 int s;
3156
3157                 csa = &start_ccb->csa;
3158                 added = csa->event_enable;
3159                 async_head = &csa->ccb_h.path->device->asyncs;
3160
3161                 /*
3162                  * If there is already an entry for us, simply
3163                  * update it.
3164                  */
3165                 s = splcam();
3166                 cur_entry = SLIST_FIRST(async_head);
3167                 while (cur_entry != NULL) {
3168                         if ((cur_entry->callback_arg == csa->callback_arg)
3169                          && (cur_entry->callback == csa->callback))
3170                                 break;
3171                         cur_entry = SLIST_NEXT(cur_entry, links);
3172                 }
3173
3174                 if (cur_entry != NULL) {
3175                         /*
3176                          * If the request has no flags set,
3177                          * remove the entry.
3178                          */
3179                         added &= ~cur_entry->event_enable;
3180                         if (csa->event_enable == 0) {
3181                                 SLIST_REMOVE(async_head, cur_entry,
3182                                              async_node, links);
3183                                 csa->ccb_h.path->device->refcount--;
3184                                 free(cur_entry, M_DEVBUF);
3185                         } else {
3186                                 cur_entry->event_enable = csa->event_enable;
3187                         }
3188                 } else {
3189                         cur_entry = malloc(sizeof(*cur_entry),
3190                                             M_DEVBUF, M_INTWAIT);
3191                         cur_entry->event_enable = csa->event_enable;
3192                         cur_entry->callback_arg = csa->callback_arg;
3193                         cur_entry->callback = csa->callback;
3194                         SLIST_INSERT_HEAD(async_head, cur_entry, links);
3195                         csa->ccb_h.path->device->refcount++;
3196                 }
3197
3198                 if ((added & AC_FOUND_DEVICE) != 0) {
3199                         /*
3200                          * Get this peripheral up to date with all
3201                          * the currently existing devices.
3202                          */
3203                         xpt_for_all_devices(xptsetasyncfunc, cur_entry);
3204                 }
3205                 if ((added & AC_PATH_REGISTERED) != 0) {
3206                         /*
3207                          * Get this peripheral up to date with all
3208                          * the currently existing busses.
3209                          */
3210                         xpt_for_all_busses(xptsetasyncbusfunc, cur_entry);
3211                 }
3212                 splx(s);
3213                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3214                 break;
3215         }
3216         case XPT_REL_SIMQ:
3217         {
3218                 struct ccb_relsim *crs;
3219                 struct cam_ed *dev;
3220                 int s;
3221
3222                 crs = &start_ccb->crs;
3223                 dev = crs->ccb_h.path->device;
3224                 if (dev == NULL) {
3225
3226                         crs->ccb_h.status = CAM_DEV_NOT_THERE;
3227                         break;
3228                 }
3229
3230                 s = splcam();
3231
3232                 if ((crs->release_flags & RELSIM_ADJUST_OPENINGS) != 0) {
3233
3234                         if ((dev->inq_data.flags & SID_CmdQue) != 0) {
3235
3236                                 /* Don't ever go below one opening */
3237                                 if (crs->openings > 0) {
3238                                         xpt_dev_ccbq_resize(crs->ccb_h.path,
3239                                                             crs->openings);
3240
3241                                         if (bootverbose) {
3242                                                 xpt_print_path(crs->ccb_h.path);
3243                                                 printf("tagged openings "
3244                                                        "now %d\n",
3245                                                        crs->openings);
3246                                         }
3247                                 }
3248                         }
3249                 }
3250
3251                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_TIMEOUT) != 0) {
3252
3253                         if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
3254
3255                                 /*
3256                                  * Just extend the old timeout and decrement
3257                                  * the freeze count so that a single timeout
3258                                  * is sufficient for releasing the queue.
3259                                  */
3260                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3261                                 untimeout(xpt_release_devq_timeout,
3262                                           dev, dev->c_handle);
3263                         } else {
3264
3265                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3266                         }
3267
3268                         dev->c_handle =
3269                                 timeout(xpt_release_devq_timeout,
3270                                         dev,
3271                                         (crs->release_timeout * hz) / 1000);
3272
3273                         dev->flags |= CAM_DEV_REL_TIMEOUT_PENDING;
3274
3275                 }
3276
3277                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_CMDCMPLT) != 0) {
3278
3279                         if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0) {
3280                                 /*
3281                                  * Decrement the freeze count so that a single
3282                                  * completion is still sufficient to unfreeze
3283                                  * the queue.
3284                                  */
3285                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3286                         } else {
3287
3288                                 dev->flags |= CAM_DEV_REL_ON_COMPLETE;
3289                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3290                         }
3291                 }
3292
3293                 if ((crs->release_flags & RELSIM_RELEASE_AFTER_QEMPTY) != 0) {
3294
3295                         if ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
3296                          || (dev->ccbq.dev_active == 0)) {
3297
3298                                 start_ccb->ccb_h.flags &= ~CAM_DEV_QFREEZE;
3299                         } else {
3300
3301                                 dev->flags |= CAM_DEV_REL_ON_QUEUE_EMPTY;
3302                                 start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
3303                         }
3304                 }
3305                 splx(s);
3306
3307                 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) == 0) {
3308
3309                         xpt_release_devq(crs->ccb_h.path, /*count*/1,
3310                                          /*run_queue*/TRUE);
3311                 }
3312                 start_ccb->crs.qfrozen_cnt = dev->qfrozen_cnt;
3313                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3314                 break;
3315         }
3316         case XPT_SCAN_BUS:
3317                 xpt_scan_bus(start_ccb->ccb_h.path->periph, start_ccb);
3318                 break;
3319         case XPT_SCAN_LUN:
3320                 xpt_scan_lun(start_ccb->ccb_h.path->periph,
3321                              start_ccb->ccb_h.path, start_ccb->crcn.flags,
3322                              start_ccb);
3323                 break;
3324         case XPT_DEBUG: {
3325 #ifdef CAMDEBUG
3326                 int s;
3327
3328                 s = splcam();
3329 #ifdef CAM_DEBUG_DELAY
3330                 cam_debug_delay = CAM_DEBUG_DELAY;
3331 #endif
3332                 cam_dflags = start_ccb->cdbg.flags;
3333                 if (cam_dpath != NULL) {
3334                         xpt_free_path(cam_dpath);
3335                         cam_dpath = NULL;
3336                 }
3337
3338                 if (cam_dflags != CAM_DEBUG_NONE) {
3339                         if (xpt_create_path(&cam_dpath, xpt_periph,
3340                                             start_ccb->ccb_h.path_id,
3341                                             start_ccb->ccb_h.target_id,
3342                                             start_ccb->ccb_h.target_lun) !=
3343                                             CAM_REQ_CMP) {
3344                                 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3345                                 cam_dflags = CAM_DEBUG_NONE;
3346                         } else {
3347                                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3348                                 xpt_print_path(cam_dpath);
3349                                 printf("debugging flags now %x\n", cam_dflags);
3350                         }
3351                 } else {
3352                         cam_dpath = NULL;
3353                         start_ccb->ccb_h.status = CAM_REQ_CMP;
3354                 }
3355                 splx(s);
3356 #else /* !CAMDEBUG */
3357                 start_ccb->ccb_h.status = CAM_FUNC_NOTAVAIL;
3358 #endif /* CAMDEBUG */
3359                 break;
3360         }
3361         case XPT_NOOP:
3362                 if ((start_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0)
3363                         xpt_freeze_devq(start_ccb->ccb_h.path, 1);
3364                 start_ccb->ccb_h.status = CAM_REQ_CMP;
3365                 break;
3366         default:
3367         case XPT_SDEV_TYPE:
3368         case XPT_TERM_IO:
3369         case XPT_ENG_INQ:
3370                 /* XXX Implement */
3371                 start_ccb->ccb_h.status = CAM_PROVIDE_FAIL;
3372                 break;
3373         }
3374         splx(iopl);
3375 }
3376
3377 void
3378 xpt_polled_action(union ccb *start_ccb)
3379 {
3380         int       s;
3381         u_int32_t timeout;
3382         struct    cam_sim *sim;
3383         struct    cam_devq *devq;
3384         struct    cam_ed *dev;
3385
3386         timeout = start_ccb->ccb_h.timeout;
3387         sim = start_ccb->ccb_h.path->bus->sim;
3388         devq = sim->devq;
3389         dev = start_ccb->ccb_h.path->device;
3390
3391         s = splcam();
3392
3393         /*
3394          * Steal an opening so that no other queued requests
3395          * can get it before us while we simulate interrupts.
3396          */
3397         dev->ccbq.devq_openings--;
3398         dev->ccbq.dev_openings--;
3399
3400         while((devq->send_openings <= 0 || dev->ccbq.dev_openings < 0)
3401            && (--timeout > 0)) {
3402                 DELAY(1000);
3403                 (*(sim->sim_poll))(sim);
3404                 swi_camnet(NULL);
3405                 swi_cambio(NULL);
3406         }
3407
3408         dev->ccbq.devq_openings++;
3409         dev->ccbq.dev_openings++;
3410
3411         if (timeout != 0) {
3412                 xpt_action(start_ccb);
3413                 while(--timeout > 0) {
3414                         (*(sim->sim_poll))(sim);
3415                         swi_camnet(NULL);
3416                         swi_cambio(NULL);
3417                         if ((start_ccb->ccb_h.status  & CAM_STATUS_MASK)
3418                             != CAM_REQ_INPROG)
3419                                 break;
3420                         DELAY(1000);
3421                 }
3422                 if (timeout == 0) {
3423                         /*
3424                          * XXX Is it worth adding a sim_timeout entry
3425                          * point so we can attempt recovery?  If
3426                          * this is only used for dumps, I don't think
3427                          * it is.
3428                          */
3429                         start_ccb->ccb_h.status = CAM_CMD_TIMEOUT;
3430                 }
3431         } else {
3432                 start_ccb->ccb_h.status = CAM_RESRC_UNAVAIL;
3433         }
3434         splx(s);
3435 }
3436
3437 /*
3438  * Schedule a peripheral driver to receive a ccb when it's
3439  * target device has space for more transactions.
3440  */
3441 void
3442 xpt_schedule(struct cam_periph *perph, u_int32_t new_priority)
3443 {
3444         struct cam_ed *device;
3445         int s;
3446         int runq;
3447
3448         CAM_DEBUG(perph->path, CAM_DEBUG_TRACE, ("xpt_schedule\n"));
3449         device = perph->path->device;
3450         s = splsoftcam();
3451         if (periph_is_queued(perph)) {
3452                 /* Simply reorder based on new priority */
3453                 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE,
3454                           ("   change priority to %d\n", new_priority));
3455                 if (new_priority < perph->pinfo.priority) {
3456                         camq_change_priority(&device->drvq,
3457                                              perph->pinfo.index,
3458                                              new_priority);
3459                 }
3460                 runq = 0;
3461         } else {
3462                 /* New entry on the queue */
3463                 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE,
3464                           ("   added periph to queue\n"));
3465                 perph->pinfo.priority = new_priority;
3466                 perph->pinfo.generation = ++device->drvq.generation;
3467                 camq_insert(&device->drvq, &perph->pinfo);
3468                 runq = xpt_schedule_dev_allocq(perph->path->bus, device);
3469         }
3470         splx(s);
3471         if (runq != 0) {
3472                 CAM_DEBUG(perph->path, CAM_DEBUG_SUBTRACE,
3473                           ("   calling xpt_run_devq\n"));
3474                 xpt_run_dev_allocq(perph->path->bus);
3475         }
3476 }
3477
3478
3479 /*
3480  * Schedule a device to run on a given queue.
3481  * If the device was inserted as a new entry on the queue,
3482  * return 1 meaning the device queue should be run. If we
3483  * were already queued, implying someone else has already
3484  * started the queue, return 0 so the caller doesn't attempt
3485  * to run the queue.  Must be run at either splsoftcam
3486  * (or splcam since that encompases splsoftcam).
3487  */
3488 static int
3489 xpt_schedule_dev(struct camq *queue, cam_pinfo *pinfo,
3490                  u_int32_t new_priority)
3491 {
3492         int retval;
3493         u_int32_t old_priority;
3494
3495         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_schedule_dev\n"));
3496
3497         old_priority = pinfo->priority;
3498
3499         /*
3500          * Are we already queued?
3501          */
3502         if (pinfo->index != CAM_UNQUEUED_INDEX) {
3503                 /* Simply reorder based on new priority */
3504                 if (new_priority < old_priority) {
3505                         camq_change_priority(queue, pinfo->index,
3506                                              new_priority);
3507                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3508                                         ("changed priority to %d\n",
3509                                          new_priority));
3510                 }
3511                 retval = 0;
3512         } else {
3513                 /* New entry on the queue */
3514                 if (new_priority < old_priority)
3515                         pinfo->priority = new_priority;
3516
3517                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3518                                 ("Inserting onto queue\n"));
3519                 pinfo->generation = ++queue->generation;
3520                 camq_insert(queue, pinfo);
3521                 retval = 1;
3522         }
3523         return (retval);
3524 }
3525
3526 static void
3527 xpt_run_dev_allocq(struct cam_eb *bus)
3528 {
3529         struct  cam_devq *devq;
3530         int     s;
3531
3532         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_allocq\n"));
3533         devq = bus->sim->devq;
3534
3535         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3536                         ("   qfrozen_cnt == 0x%x, entries == %d, "
3537                          "openings == %d, active == %d\n",
3538                          devq->alloc_queue.qfrozen_cnt,
3539                          devq->alloc_queue.entries,
3540                          devq->alloc_openings,
3541                          devq->alloc_active));
3542
3543         s = splsoftcam();
3544         devq->alloc_queue.qfrozen_cnt++;
3545         while ((devq->alloc_queue.entries > 0)
3546             && (devq->alloc_openings > 0)
3547             && (devq->alloc_queue.qfrozen_cnt <= 1)) {
3548                 struct  cam_ed_qinfo *qinfo;
3549                 struct  cam_ed *device;
3550                 union   ccb *work_ccb;
3551                 struct  cam_periph *drv;
3552                 struct  camq *drvq;
3553
3554                 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->alloc_queue,
3555                                                            CAMQ_HEAD);
3556                 device = qinfo->device;
3557
3558                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3559                                 ("running device %p\n", device));
3560
3561                 drvq = &device->drvq;
3562
3563 #ifdef CAMDEBUG
3564                 if (drvq->entries <= 0) {
3565                         panic("xpt_run_dev_allocq: "
3566                               "Device on queue without any work to do");
3567                 }
3568 #endif
3569                 if ((work_ccb = xpt_get_ccb(device)) != NULL) {
3570                         devq->alloc_openings--;
3571                         devq->alloc_active++;
3572                         drv = (struct cam_periph*)camq_remove(drvq, CAMQ_HEAD);
3573                         splx(s);
3574                         xpt_setup_ccb(&work_ccb->ccb_h, drv->path,
3575                                       drv->pinfo.priority);
3576                         CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3577                                         ("calling periph start\n"));
3578                         drv->periph_start(drv, work_ccb);
3579                 } else {
3580                         /*
3581                          * Malloc failure in alloc_ccb
3582                          */
3583                         /*
3584                          * XXX add us to a list to be run from free_ccb
3585                          * if we don't have any ccbs active on this
3586                          * device queue otherwise we may never get run
3587                          * again.
3588                          */
3589                         break;
3590                 }
3591
3592                 /* Raise IPL for possible insertion and test at top of loop */
3593                 s = splsoftcam();
3594
3595                 if (drvq->entries > 0) {
3596                         /* We have more work.  Attempt to reschedule */
3597                         xpt_schedule_dev_allocq(bus, device);
3598                 }
3599         }
3600         devq->alloc_queue.qfrozen_cnt--;
3601         splx(s);
3602 }
3603
3604 static void
3605 xpt_run_dev_sendq(struct cam_eb *bus)
3606 {
3607         struct  cam_devq *devq;
3608         int     s;
3609
3610         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_run_dev_sendq\n"));
3611
3612         devq = bus->sim->devq;
3613
3614         s = splcam();
3615         devq->send_queue.qfrozen_cnt++;
3616         splx(s);
3617         s = splsoftcam();
3618         while ((devq->send_queue.entries > 0)
3619             && (devq->send_openings > 0)) {
3620                 struct  cam_ed_qinfo *qinfo;
3621                 struct  cam_ed *device;
3622                 union ccb *work_ccb;
3623                 struct  cam_sim *sim;
3624                 int     ospl;
3625
3626                 ospl = splcam();
3627                 if (devq->send_queue.qfrozen_cnt > 1) {
3628                         splx(ospl);
3629                         break;
3630                 }
3631
3632                 qinfo = (struct cam_ed_qinfo *)camq_remove(&devq->send_queue,
3633                                                            CAMQ_HEAD);
3634                 device = qinfo->device;
3635
3636                 /*
3637                  * If the device has been "frozen", don't attempt
3638                  * to run it.
3639                  */
3640                 if (device->qfrozen_cnt > 0) {
3641                         splx(ospl);
3642                         continue;
3643                 }
3644
3645                 CAM_DEBUG_PRINT(CAM_DEBUG_XPT,
3646                                 ("running device %p\n", device));
3647
3648                 work_ccb = cam_ccbq_peek_ccb(&device->ccbq, CAMQ_HEAD);
3649                 if (work_ccb == NULL) {
3650                         printf("device on run queue with no ccbs???\n");
3651                         splx(ospl);
3652                         continue;
3653                 }
3654
3655                 if ((work_ccb->ccb_h.flags & CAM_HIGH_POWER) != 0) {
3656
3657                         if (num_highpower <= 0) {
3658                                 /*
3659                                  * We got a high power command, but we
3660                                  * don't have any available slots.  Freeze
3661                                  * the device queue until we have a slot
3662                                  * available.
3663                                  */
3664                                 device->qfrozen_cnt++;
3665                                 STAILQ_INSERT_TAIL(&highpowerq,
3666                                                    &work_ccb->ccb_h,
3667                                                    xpt_links.stqe);
3668
3669                                 splx(ospl);
3670                                 continue;
3671                         } else {
3672                                 /*
3673                                  * Consume a high power slot while
3674                                  * this ccb runs.
3675                                  */
3676                                 num_highpower--;
3677                         }
3678                 }
3679                 devq->active_dev = device;
3680                 cam_ccbq_remove_ccb(&device->ccbq, work_ccb);
3681
3682                 cam_ccbq_send_ccb(&device->ccbq, work_ccb);
3683                 splx(ospl);
3684
3685                 devq->send_openings--;
3686                 devq->send_active++;
3687
3688                 if (device->ccbq.queue.entries > 0)
3689                         xpt_schedule_dev_sendq(bus, device);
3690
3691                 if (work_ccb && (work_ccb->ccb_h.flags & CAM_DEV_QFREEZE) != 0){
3692                         /*
3693                          * The client wants to freeze the queue
3694                          * after this CCB is sent.
3695                          */
3696                         ospl = splcam();
3697                         device->qfrozen_cnt++;
3698                         splx(ospl);
3699                 }
3700
3701                 splx(s);
3702
3703                 /* In Target mode, the peripheral driver knows best... */
3704                 if (work_ccb->ccb_h.func_code == XPT_SCSI_IO) {
3705                         if ((device->inq_flags & SID_CmdQue) != 0
3706                          && work_ccb->csio.tag_action != CAM_TAG_ACTION_NONE)
3707                                 work_ccb->ccb_h.flags |= CAM_TAG_ACTION_VALID;
3708                         else
3709                                 /*
3710                                  * Clear this in case of a retried CCB that
3711                                  * failed due to a rejected tag.
3712                                  */
3713                                 work_ccb->ccb_h.flags &= ~CAM_TAG_ACTION_VALID;
3714                 }
3715
3716                 /*
3717                  * Device queues can be shared among multiple sim instances
3718                  * that reside on different busses.  Use the SIM in the queue
3719                  * CCB's path, rather than the one in the bus that was passed
3720                  * into this function.
3721                  */
3722                 sim = work_ccb->ccb_h.path->bus->sim;
3723                 (*(sim->sim_action))(sim, work_ccb);
3724
3725                 ospl = splcam();
3726                 devq->active_dev = NULL;
3727                 splx(ospl);
3728                 /* Raise IPL for possible insertion and test at top of loop */
3729                 s = splsoftcam();
3730         }
3731         splx(s);
3732         s = splcam();
3733         devq->send_queue.qfrozen_cnt--;
3734         splx(s);
3735 }
3736
3737 /*
3738  * This function merges stuff from the slave ccb into the master ccb, while
3739  * keeping important fields in the master ccb constant.
3740  */
3741 void
3742 xpt_merge_ccb(union ccb *master_ccb, union ccb *slave_ccb)
3743 {
3744         /*
3745          * Pull fields that are valid for peripheral drivers to set
3746          * into the master CCB along with the CCB "payload".
3747          */
3748         master_ccb->ccb_h.retry_count = slave_ccb->ccb_h.retry_count;
3749         master_ccb->ccb_h.func_code = slave_ccb->ccb_h.func_code;
3750         master_ccb->ccb_h.timeout = slave_ccb->ccb_h.timeout;
3751         master_ccb->ccb_h.flags = slave_ccb->ccb_h.flags;
3752         bcopy(&(&slave_ccb->ccb_h)[1], &(&master_ccb->ccb_h)[1],
3753               sizeof(union ccb) - sizeof(struct ccb_hdr));
3754 }
3755
3756 void
3757 xpt_setup_ccb(struct ccb_hdr *ccb_h, struct cam_path *path, u_int32_t priority)
3758 {
3759         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_setup_ccb\n"));
3760         ccb_h->pinfo.priority = priority;
3761         ccb_h->path = path;
3762         ccb_h->path_id = path->bus->path_id;
3763         if (path->target)
3764                 ccb_h->target_id = path->target->target_id;
3765         else
3766                 ccb_h->target_id = CAM_TARGET_WILDCARD;
3767         if (path->device) {
3768                 ccb_h->target_lun = path->device->lun_id;
3769                 ccb_h->pinfo.generation = ++path->device->ccbq.queue.generation;
3770         } else {
3771                 ccb_h->target_lun = CAM_TARGET_WILDCARD;
3772         }
3773         ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
3774         ccb_h->flags = 0;
3775 }
3776
3777 /* Path manipulation functions */
3778 cam_status
3779 xpt_create_path(struct cam_path **new_path_ptr, struct cam_periph *perph,
3780                 path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3781 {
3782         struct     cam_path *path;
3783         cam_status status;
3784
3785         path = malloc(sizeof(*path), M_DEVBUF, M_INTWAIT);
3786         status = xpt_compile_path(path, perph, path_id, target_id, lun_id);
3787         if (status != CAM_REQ_CMP) {
3788                 free(path, M_DEVBUF);
3789                 path = NULL;
3790         }
3791         *new_path_ptr = path;
3792         return (status);
3793 }
3794
3795 static cam_status
3796 xpt_compile_path(struct cam_path *new_path, struct cam_periph *perph,
3797                  path_id_t path_id, target_id_t target_id, lun_id_t lun_id)
3798 {
3799         struct       cam_eb *bus;
3800         struct       cam_et *target;
3801         struct       cam_ed *device;
3802         cam_status   status;
3803         int          s;
3804
3805         status = CAM_REQ_CMP;   /* Completed without error */
3806         target = NULL;          /* Wildcarded */
3807         device = NULL;          /* Wildcarded */
3808
3809         /*
3810          * We will potentially modify the EDT, so block interrupts
3811          * that may attempt to create cam paths.
3812          */
3813         s = splcam();
3814         bus = xpt_find_bus(path_id);
3815         if (bus == NULL) {
3816                 status = CAM_PATH_INVALID;
3817         } else {
3818                 target = xpt_find_target(bus, target_id);
3819                 if (target == NULL) {
3820                         /* Create one */
3821                         struct cam_et *new_target;
3822
3823                         new_target = xpt_alloc_target(bus, target_id);
3824                         if (new_target == NULL) {
3825                                 status = CAM_RESRC_UNAVAIL;
3826                         } else {
3827                                 target = new_target;
3828                         }
3829                 }
3830                 if (target != NULL) {
3831                         device = xpt_find_device(target, lun_id);
3832                         if (device == NULL) {
3833                                 /* Create one */
3834                                 struct cam_ed *new_device;
3835
3836                                 new_device = xpt_alloc_device(bus,
3837                                                               target,
3838                                                               lun_id);
3839                                 if (new_device == NULL) {
3840                                         status = CAM_RESRC_UNAVAIL;
3841                                 } else {
3842                                         device = new_device;
3843                                 }
3844                         }
3845                 }
3846         }
3847         splx(s);
3848
3849         /*
3850          * Only touch the user's data if we are successful.
3851          */
3852         if (status == CAM_REQ_CMP) {
3853                 new_path->periph = perph;
3854                 new_path->bus = bus;
3855                 new_path->target = target;
3856                 new_path->device = device;
3857                 CAM_DEBUG(new_path, CAM_DEBUG_TRACE, ("xpt_compile_path\n"));
3858         } else {
3859                 if (device != NULL)
3860                         xpt_release_device(bus, target, device);
3861                 if (target != NULL)
3862                         xpt_release_target(bus, target);
3863                 if (bus != NULL)
3864                         xpt_release_bus(bus);
3865         }
3866         return (status);
3867 }
3868
3869 static void
3870 xpt_release_path(struct cam_path *path)
3871 {
3872         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_release_path\n"));
3873         if (path->device != NULL) {
3874                 xpt_release_device(path->bus, path->target, path->device);
3875                 path->device = NULL;
3876         }
3877         if (path->target != NULL) {
3878                 xpt_release_target(path->bus, path->target);
3879                 path->target = NULL;
3880         }
3881         if (path->bus != NULL) {
3882                 xpt_release_bus(path->bus);
3883                 path->bus = NULL;
3884         }
3885 }
3886
3887 void
3888 xpt_free_path(struct cam_path *path)
3889 {
3890         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_free_path\n"));
3891         xpt_release_path(path);
3892         free(path, M_DEVBUF);
3893 }
3894
3895
3896 /*
3897  * Return -1 for failure, 0 for exact match, 1 for match with wildcards
3898  * in path1, 2 for match with wildcards in path2.
3899  */
3900 int
3901 xpt_path_comp(struct cam_path *path1, struct cam_path *path2)
3902 {
3903         int retval = 0;
3904
3905         if (path1->bus != path2->bus) {
3906                 if (path1->bus->path_id == CAM_BUS_WILDCARD)
3907                         retval = 1;
3908                 else if (path2->bus->path_id == CAM_BUS_WILDCARD)
3909                         retval = 2;
3910                 else
3911                         return (-1);
3912         }
3913         if (path1->target != path2->target) {
3914                 if (path1->target->target_id == CAM_TARGET_WILDCARD) {
3915                         if (retval == 0)
3916                                 retval = 1;
3917                 } else if (path2->target->target_id == CAM_TARGET_WILDCARD)
3918                         retval = 2;
3919                 else
3920                         return (-1);
3921         }
3922         if (path1->device != path2->device) {
3923                 if (path1->device->lun_id == CAM_LUN_WILDCARD) {
3924                         if (retval == 0)
3925                                 retval = 1;
3926                 } else if (path2->device->lun_id == CAM_LUN_WILDCARD)
3927                         retval = 2;
3928                 else
3929                         return (-1);
3930         }
3931         return (retval);
3932 }
3933
3934 void
3935 xpt_print_path(struct cam_path *path)
3936 {
3937         if (path == NULL)
3938                 printf("(nopath): ");
3939         else {
3940                 if (path->periph != NULL)
3941                         printf("(%s%d:", path->periph->periph_name,
3942                                path->periph->unit_number);
3943                 else
3944                         printf("(noperiph:");
3945
3946                 if (path->bus != NULL)
3947                         printf("%s%d:%d:", path->bus->sim->sim_name,
3948                                path->bus->sim->unit_number,
3949                                path->bus->sim->bus_id);
3950                 else
3951                         printf("nobus:");
3952
3953                 if (path->target != NULL)
3954                         printf("%d:", path->target->target_id);
3955                 else
3956                         printf("X:");
3957
3958                 if (path->device != NULL)
3959                         printf("%d): ", path->device->lun_id);
3960                 else
3961                         printf("X): ");
3962         }
3963 }
3964
3965 path_id_t
3966 xpt_path_path_id(struct cam_path *path)
3967 {
3968         return(path->bus->path_id);
3969 }
3970
3971 target_id_t
3972 xpt_path_target_id(struct cam_path *path)
3973 {
3974         if (path->target != NULL)
3975                 return (path->target->target_id);
3976         else
3977                 return (CAM_TARGET_WILDCARD);
3978 }
3979
3980 lun_id_t
3981 xpt_path_lun_id(struct cam_path *path)
3982 {
3983         if (path->device != NULL)
3984                 return (path->device->lun_id);
3985         else
3986                 return (CAM_LUN_WILDCARD);
3987 }
3988
3989 struct cam_sim *
3990 xpt_path_sim(struct cam_path *path)
3991 {
3992         return (path->bus->sim);
3993 }
3994
3995 struct cam_periph*
3996 xpt_path_periph(struct cam_path *path)
3997 {
3998         return (path->periph);
3999 }
4000
4001 /*
4002  * Release a CAM control block for the caller.  Remit the cost of the structure
4003  * to the device referenced by the path.  If the this device had no 'credits'
4004  * and peripheral drivers have registered async callbacks for this notification
4005  * call them now.
4006  */
4007 void
4008 xpt_release_ccb(union ccb *free_ccb)
4009 {
4010         int      s;
4011         struct   cam_path *path;
4012         struct   cam_ed *device;
4013         struct   cam_eb *bus;
4014
4015         CAM_DEBUG_PRINT(CAM_DEBUG_XPT, ("xpt_release_ccb\n"));
4016         path = free_ccb->ccb_h.path;
4017         device = path->device;
4018         bus = path->bus;
4019         s = splsoftcam();
4020         cam_ccbq_release_opening(&device->ccbq);
4021         if (xpt_ccb_count > xpt_max_ccbs) {
4022                 xpt_free_ccb(free_ccb);
4023                 xpt_ccb_count--;
4024         } else {
4025                 SLIST_INSERT_HEAD(&ccb_freeq, &free_ccb->ccb_h, xpt_links.sle);
4026         }
4027         bus->sim->devq->alloc_openings++;
4028         bus->sim->devq->alloc_active--;
4029         /* XXX Turn this into an inline function - xpt_run_device?? */
4030         if ((device_is_alloc_queued(device) == 0)
4031          && (device->drvq.entries > 0)) {
4032                 xpt_schedule_dev_allocq(bus, device);
4033         }
4034         splx(s);
4035         if (dev_allocq_is_runnable(bus->sim->devq))
4036                 xpt_run_dev_allocq(bus);
4037 }
4038
4039 /* Functions accessed by SIM drivers */
4040
4041 /*
4042  * A sim structure, listing the SIM entry points and instance
4043  * identification info is passed to xpt_bus_register to hook the SIM
4044  * into the CAM framework.  xpt_bus_register creates a cam_eb entry
4045  * for this new bus and places it in the array of busses and assigns
4046  * it a path_id.  The path_id may be influenced by "hard wiring"
4047  * information specified by the user.  Once interrupt services are
4048  * availible, the bus will be probed.
4049  */
4050 int32_t
4051 xpt_bus_register(struct cam_sim *sim, u_int32_t bus)
4052 {
4053         struct cam_eb *new_bus;
4054         struct cam_eb *old_bus;
4055         struct ccb_pathinq cpi;
4056         int s;
4057
4058         sim->bus_id = bus;
4059         new_bus = malloc(sizeof(*new_bus), M_DEVBUF, M_INTWAIT);
4060
4061         if (strcmp(sim->sim_name, "xpt") != 0) {
4062                 sim->path_id =
4063                     xptpathid(sim->sim_name, sim->unit_number, sim->bus_id);
4064         }
4065
4066         TAILQ_INIT(&new_bus->et_entries);
4067         new_bus->path_id = sim->path_id;
4068         new_bus->sim = sim;
4069         ++sim->refcount;
4070         timevalclear(&new_bus->last_reset);
4071         new_bus->flags = 0;
4072         new_bus->refcount = 1;  /* Held until a bus_deregister event */
4073         new_bus->generation = 0;
4074         s = splcam();
4075         old_bus = TAILQ_FIRST(&xpt_busses);
4076         while (old_bus != NULL
4077             && old_bus->path_id < new_bus->path_id)
4078                 old_bus = TAILQ_NEXT(old_bus, links);
4079         if (old_bus != NULL)
4080                 TAILQ_INSERT_BEFORE(old_bus, new_bus, links);
4081         else
4082                 TAILQ_INSERT_TAIL(&xpt_busses, new_bus, links);
4083         bus_generation++;
4084         splx(s);
4085
4086         /* Notify interested parties */
4087         if (sim->path_id != CAM_XPT_PATH_ID) {
4088                 struct cam_path path;
4089
4090                 xpt_compile_path(&path, /*periph*/NULL, sim->path_id,
4091                                  CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
4092                 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1);
4093                 cpi.ccb_h.func_code = XPT_PATH_INQ;
4094                 xpt_action((union ccb *)&cpi);
4095                 xpt_async(AC_PATH_REGISTERED, xpt_periph->path, &cpi);
4096                 xpt_release_path(&path);
4097         }
4098         return (CAM_SUCCESS);
4099 }
4100
4101 /*
4102  * Deregister a bus.  We must clean out all transactions pending on the bus.
4103  * This routine is typically called prior to cam_sim_free() (e.g. see
4104  * dev/usbmisc/umass/umass.c)
4105  */
4106 int32_t
4107 xpt_bus_deregister(path_id_t pathid)
4108 {
4109         struct cam_path bus_path;
4110         cam_status status;
4111
4112         status = xpt_compile_path(&bus_path, NULL, pathid,
4113                                   CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
4114         if (status != CAM_REQ_CMP)
4115                 return (status);
4116
4117         /*
4118          * This should clear out all pending requests and timeouts, but
4119          * the ccb's may be queued to a software interrupt.
4120          *
4121          * XXX AC_LOST_DEVICE does not precisely abort the pending requests,
4122          * and it really ought to.
4123          */
4124         xpt_async(AC_LOST_DEVICE, &bus_path, NULL);
4125         xpt_async(AC_PATH_DEREGISTERED, &bus_path, NULL);
4126
4127         /* make sure all responses have been processed */
4128         camisr(&cam_netq);
4129         camisr(&cam_bioq);
4130
4131         /* Release the reference count held while registered. */
4132         xpt_release_bus(bus_path.bus);
4133         xpt_release_path(&bus_path);
4134
4135         return (CAM_REQ_CMP);
4136 }
4137
4138 static path_id_t
4139 xptnextfreepathid(void)
4140 {
4141         struct cam_eb *bus;
4142         path_id_t pathid;
4143         char *strval;
4144
4145         pathid = 0;
4146         bus = TAILQ_FIRST(&xpt_busses);
4147 retry:
4148         /* Find an unoccupied pathid */
4149         while (bus != NULL
4150             && bus->path_id <= pathid) {
4151                 if (bus->path_id == pathid)
4152                         pathid++;
4153                 bus = TAILQ_NEXT(bus, links);
4154         }
4155
4156         /*
4157          * Ensure that this pathid is not reserved for
4158          * a bus that may be registered in the future.
4159          */
4160         if (resource_string_value("scbus", pathid, "at", &strval) == 0) {
4161                 ++pathid;
4162                 /* Start the search over */
4163                 goto retry;
4164         }
4165         return (pathid);
4166 }
4167
4168 static path_id_t
4169 xptpathid(const char *sim_name, int sim_unit, int sim_bus)
4170 {
4171         path_id_t pathid;
4172         int i, dunit, val;
4173         char buf[32], *strval;
4174
4175         pathid = CAM_XPT_PATH_ID;
4176         snprintf(buf, sizeof(buf), "%s%d", sim_name, sim_unit);
4177         i = -1;
4178         while ((i = resource_locate(i, "scbus")) != -1) {
4179                 dunit = resource_query_unit(i);
4180                 if (dunit < 0)          /* unwired?! */
4181                         continue;
4182                 if (resource_string_value("scbus", dunit, "at", &strval) != 0)
4183                         continue;
4184                 if (strcmp(buf, strval) != 0)
4185                         continue;
4186                 if (resource_int_value("scbus", dunit, "bus", &val) == 0) {
4187                         if (sim_bus == val) {
4188                                 pathid = dunit;
4189                                 break;
4190                         }
4191                 } else if (sim_bus == 0) {
4192                         /* Unspecified matches bus 0 */
4193                         pathid = dunit;
4194                         break;
4195                 } else {
4196                         printf("Ambiguous scbus configuration for %s%d "
4197                                "bus %d, cannot wire down.  The kernel "
4198                                "config entry for scbus%d should "
4199                                "specify a controller bus.\n"
4200                                "Scbus will be assigned dynamically.\n",
4201                                sim_name, sim_unit, sim_bus, dunit);
4202                         break;
4203                 }
4204         }
4205
4206         if (pathid == CAM_XPT_PATH_ID)
4207                 pathid = xptnextfreepathid();
4208         return (pathid);
4209 }
4210
4211 void
4212 xpt_async(u_int32_t async_code, struct cam_path *path, void *async_arg)
4213 {
4214         struct cam_eb *bus;
4215         struct cam_et *target, *next_target;
4216         struct cam_ed *device, *next_device;
4217         int s;
4218
4219         CAM_DEBUG(path, CAM_DEBUG_TRACE, ("xpt_async\n"));
4220
4221         /*
4222          * Most async events come from a CAM interrupt context.  In
4223          * a few cases, the error recovery code at the peripheral layer,
4224          * which may run from our SWI or a process context, may signal
4225          * deferred events with a call to xpt_async. Ensure async
4226          * notifications are serialized by blocking cam interrupts.
4227          */
4228         s = splcam();
4229
4230         bus = path->bus;
4231
4232         if (async_code == AC_BUS_RESET) {
4233                 /* Update our notion of when the last reset occurred */
4234                 microuptime(&bus->last_reset);
4235         }
4236
4237         for (target = TAILQ_FIRST(&bus->et_entries);
4238              target != NULL;
4239              target = next_target) {
4240
4241                 next_target = TAILQ_NEXT(target, links);
4242
4243                 if (path->target != target
4244                  && path->target->target_id != CAM_TARGET_WILDCARD
4245                  && target->target_id != CAM_TARGET_WILDCARD)
4246                         continue;
4247
4248                 if (async_code == AC_SENT_BDR) {
4249                         /* Update our notion of when the last reset occurred */
4250                         microuptime(&path->target->last_reset);
4251                 }
4252
4253                 for (device = TAILQ_FIRST(&target->ed_entries);
4254                      device != NULL;
4255                      device = next_device) {
4256
4257                         next_device = TAILQ_NEXT(device, links);
4258
4259                         if (path->device != device
4260                          && path->device->lun_id != CAM_LUN_WILDCARD
4261                          && device->lun_id != CAM_LUN_WILDCARD)
4262                                 continue;
4263
4264                         xpt_dev_async(async_code, bus, target,
4265                                       device, async_arg);
4266
4267                         xpt_async_bcast(&device->asyncs, async_code,
4268                                         path, async_arg);
4269                 }
4270         }
4271
4272         /*
4273          * If this wasn't a fully wildcarded async, tell all
4274          * clients that want all async events.
4275          */
4276         if (bus != xpt_periph->path->bus)
4277                 xpt_async_bcast(&xpt_periph->path->device->asyncs, async_code,
4278                                 path, async_arg);
4279         splx(s);
4280 }
4281
4282 static void
4283 xpt_async_bcast(struct async_list *async_head,
4284                 u_int32_t async_code,
4285                 struct cam_path *path, void *async_arg)
4286 {
4287         struct async_node *cur_entry;
4288
4289         cur_entry = SLIST_FIRST(async_head);
4290         while (cur_entry != NULL) {
4291                 struct async_node *next_entry;
4292                 /*
4293                  * Grab the next list entry before we call the current
4294                  * entry's callback.  This is because the callback function
4295                  * can delete its async callback entry.
4296                  */
4297                 next_entry = SLIST_NEXT(cur_entry, links);
4298                 if ((cur_entry->event_enable & async_code) != 0)
4299                         cur_entry->callback(cur_entry->callback_arg,
4300                                             async_code, path,
4301                                             async_arg);
4302                 cur_entry = next_entry;
4303         }
4304 }
4305
4306 /*
4307  * Handle any per-device event notifications that require action by the XPT.
4308  */
4309 static void
4310 xpt_dev_async(u_int32_t async_code, struct cam_eb *bus, struct cam_et *target,
4311               struct cam_ed *device, void *async_arg)
4312 {
4313         cam_status status;
4314         struct cam_path newpath;
4315
4316         /*
4317          * We only need to handle events for real devices.
4318          */
4319         if (target->target_id == CAM_TARGET_WILDCARD
4320          || device->lun_id == CAM_LUN_WILDCARD)
4321                 return;
4322
4323         /*
4324          * We need our own path with wildcards expanded to
4325          * handle certain types of events.
4326          */
4327         if ((async_code == AC_SENT_BDR)
4328          || (async_code == AC_BUS_RESET)
4329          || (async_code == AC_INQ_CHANGED))
4330                 status = xpt_compile_path(&newpath, NULL,
4331                                           bus->path_id,
4332                                           target->target_id,
4333                                           device->lun_id);
4334         else
4335                 status = CAM_REQ_CMP_ERR;
4336
4337         if (status == CAM_REQ_CMP) {
4338
4339                 /*
4340                  * Allow transfer negotiation to occur in a
4341                  * tag free environment.
4342                  */
4343                 if (async_code == AC_SENT_BDR
4344                  || async_code == AC_BUS_RESET)
4345                         xpt_toggle_tags(&newpath);
4346
4347                 if (async_code == AC_INQ_CHANGED) {
4348                         /*
4349                          * We've sent a start unit command, or
4350                          * something similar to a device that
4351                          * may have caused its inquiry data to
4352                          * change. So we re-scan the device to
4353                          * refresh the inquiry data for it.
4354                          */
4355                         xpt_scan_lun(newpath.periph, &newpath,
4356                                      CAM_EXPECT_INQ_CHANGE, NULL);
4357                 }
4358                 xpt_release_path(&newpath);
4359         } else if (async_code == AC_LOST_DEVICE) {
4360                 /*
4361                  * When we lose a device the device may be about to detach
4362                  * the sim, we have to clear out all pending timeouts and
4363                  * requests before that happens.  XXX it would be nice if
4364                  * we could abort the requests pertaining to the device.
4365                  */
4366                 xpt_release_devq_timeout(device);
4367                 if ((device->flags & CAM_DEV_UNCONFIGURED) == 0) {
4368                         device->flags |= CAM_DEV_UNCONFIGURED;
4369                         xpt_release_device(bus, target, device);
4370                 }
4371         } else if (async_code == AC_TRANSFER_NEG) {
4372                 struct ccb_trans_settings *settings;
4373
4374                 settings = (struct ccb_trans_settings *)async_arg;
4375                 xpt_set_transfer_settings(settings, device,
4376                                           /*async_update*/TRUE);
4377         }
4378 }
4379
4380 u_int32_t
4381 xpt_freeze_devq(struct cam_path *path, u_int count)
4382 {
4383         int s;
4384         struct ccb_hdr *ccbh;
4385
4386         s = splcam();
4387         path->device->qfrozen_cnt += count;
4388
4389         /*
4390          * Mark the last CCB in the queue as needing
4391          * to be requeued if the driver hasn't
4392          * changed it's state yet.  This fixes a race
4393          * where a ccb is just about to be queued to
4394          * a controller driver when it's interrupt routine
4395          * freezes the queue.  To completly close the
4396          * hole, controller drives must check to see
4397          * if a ccb's status is still CAM_REQ_INPROG
4398          * under spl protection just before they queue
4399          * the CCB.  See ahc_action/ahc_freeze_devq for
4400          * an example.
4401          */
4402         ccbh = TAILQ_LAST(&path->device->ccbq.active_ccbs, ccb_hdr_tailq);
4403         if (ccbh && ccbh->status == CAM_REQ_INPROG)
4404                 ccbh->status = CAM_REQUEUE_REQ;
4405         splx(s);
4406         return (path->device->qfrozen_cnt);
4407 }
4408
4409 u_int32_t
4410 xpt_freeze_simq(struct cam_sim *sim, u_int count)
4411 {
4412         sim->devq->send_queue.qfrozen_cnt += count;
4413         if (sim->devq->active_dev != NULL) {
4414                 struct ccb_hdr *ccbh;
4415
4416                 ccbh = TAILQ_LAST(&sim->devq->active_dev->ccbq.active_ccbs,
4417                                   ccb_hdr_tailq);
4418                 if (ccbh && ccbh->status == CAM_REQ_INPROG)
4419                         ccbh->status = CAM_REQUEUE_REQ;
4420         }
4421         return (sim->devq->send_queue.qfrozen_cnt);
4422 }
4423
4424 /*
4425  * WARNING: most devices, especially USB/UMASS, may detach their sim early.
4426  * We ref-count the sim (and the bus only NULLs it out when the bus has been
4427  * freed, which is not the case here), but the device queue is also freed XXX
4428  * and we have to check that here.
4429  *
4430  * XXX fixme: could we simply not null-out the device queue via
4431  * cam_sim_free()?
4432  */
4433 static void
4434 xpt_release_devq_timeout(void *arg)
4435 {
4436         struct cam_ed *device;
4437
4438         device = (struct cam_ed *)arg;
4439
4440         xpt_release_devq_device(device, /*count*/1, /*run_queue*/TRUE);
4441 }
4442
4443 void
4444 xpt_release_devq(struct cam_path *path, u_int count, int run_queue)
4445 {
4446         xpt_release_devq_device(path->device, count, run_queue);
4447 }
4448
4449 static void
4450 xpt_release_devq_device(struct cam_ed *dev, u_int count, int run_queue)
4451 {
4452         int     rundevq;
4453         int     s0, s1;
4454
4455         rundevq = 0;
4456         s0 = splsoftcam();
4457         s1 = splcam();
4458
4459         if (dev->qfrozen_cnt > 0) {
4460
4461                 count = (count > dev->qfrozen_cnt) ? dev->qfrozen_cnt : count;
4462                 dev->qfrozen_cnt -= count;
4463                 if (dev->qfrozen_cnt == 0) {
4464
4465                         /*
4466                          * No longer need to wait for a successful
4467                          * command completion.
4468                          */
4469                         dev->flags &= ~CAM_DEV_REL_ON_COMPLETE;
4470
4471                         /*
4472                          * Remove any timeouts that might be scheduled
4473                          * to release this queue.
4474                          */
4475                         if ((dev->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
4476                                 untimeout(xpt_release_devq_timeout, dev,
4477                                           dev->c_handle);
4478                                 dev->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING;
4479                         }
4480
4481                         /*
4482                          * Now that we are unfrozen schedule the
4483                          * device so any pending transactions are
4484                          * run.
4485                          */
4486                         if ((dev->ccbq.queue.entries > 0)
4487                          && (xpt_schedule_dev_sendq(dev->target->bus, dev))
4488                          && (run_queue != 0)) {
4489                                 rundevq = 1;
4490                         }
4491                 }
4492         }
4493         splx(s1);
4494         if (rundevq != 0)
4495                 xpt_run_dev_sendq(dev->target->bus);
4496         splx(s0);
4497 }
4498
4499 void
4500 xpt_release_simq(struct cam_sim *sim, int run_queue)
4501 {
4502         int     s;
4503         struct  camq *sendq;
4504
4505         sendq = &(sim->devq->send_queue);
4506         s = splcam();
4507         if (sendq->qfrozen_cnt > 0) {
4508
4509                 sendq->qfrozen_cnt--;
4510                 if (sendq->qfrozen_cnt == 0) {
4511                         struct cam_eb *bus;
4512
4513                         /*
4514                          * If there is a timeout scheduled to release this
4515                          * sim queue, remove it.  The queue frozen count is
4516                          * already at 0.
4517                          */
4518                         if ((sim->flags & CAM_SIM_REL_TIMEOUT_PENDING) != 0){
4519                                 untimeout(xpt_release_simq_timeout, sim,
4520                                           sim->c_handle);
4521                                 sim->flags &= ~CAM_SIM_REL_TIMEOUT_PENDING;
4522                         }
4523                         bus = xpt_find_bus(sim->path_id);
4524                         splx(s);
4525
4526                         if (run_queue) {
4527                                 /*
4528                                  * Now that we are unfrozen run the send queue.
4529                                  */
4530                                 xpt_run_dev_sendq(bus);
4531                         }
4532                         xpt_release_bus(bus);
4533                 } else
4534                         splx(s);
4535         } else
4536                 splx(s);
4537 }
4538
4539 static void
4540 xpt_release_simq_timeout(void *arg)
4541 {
4542         struct cam_sim *sim;
4543
4544         sim = (struct cam_sim *)arg;
4545         xpt_release_simq(sim, /* run_queue */ TRUE);
4546 }
4547
4548 void
4549 xpt_done(union ccb *done_ccb)
4550 {
4551         int s;
4552
4553         s = splcam();
4554
4555         CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xpt_done\n"));
4556         if ((done_ccb->ccb_h.func_code & XPT_FC_QUEUED) != 0) {
4557                 /*
4558                  * Queue up the request for handling by our SWI handler
4559                  * any of the "non-immediate" type of ccbs.
4560                  */
4561                 switch (done_ccb->ccb_h.path->periph->type) {
4562                 case CAM_PERIPH_BIO:
4563                         TAILQ_INSERT_TAIL(&cam_bioq, &done_ccb->ccb_h,
4564                                           sim_links.tqe);
4565                         done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX;
4566                         setsoftcambio();
4567                         break;
4568                 case CAM_PERIPH_NET:
4569                         TAILQ_INSERT_TAIL(&cam_netq, &done_ccb->ccb_h,
4570                                           sim_links.tqe);
4571                         done_ccb->ccb_h.pinfo.index = CAM_DONEQ_INDEX;
4572                         setsoftcamnet();
4573                         break;
4574                 }
4575         }
4576         splx(s);
4577 }
4578
4579 union ccb *
4580 xpt_alloc_ccb()
4581 {
4582         union ccb *new_ccb;
4583
4584         new_ccb = malloc(sizeof(*new_ccb), M_DEVBUF, M_INTWAIT);
4585         return (new_ccb);
4586 }
4587
4588 void
4589 xpt_free_ccb(union ccb *free_ccb)
4590 {
4591         free(free_ccb, M_DEVBUF);
4592 }
4593
4594
4595
4596 /* Private XPT functions */
4597
4598 /*
4599  * Get a CAM control block for the caller. Charge the structure to the device
4600  * referenced by the path.  If the this device has no 'credits' then the
4601  * device already has the maximum number of outstanding operations under way
4602  * and we return NULL. If we don't have sufficient resources to allocate more
4603  * ccbs, we also return NULL.
4604  */
4605 static union ccb *
4606 xpt_get_ccb(struct cam_ed *device)
4607 {
4608         union ccb *new_ccb;
4609         int s;
4610
4611         s = splsoftcam();
4612         if ((new_ccb = (union ccb *)ccb_freeq.slh_first) == NULL) {
4613                 new_ccb = malloc(sizeof(*new_ccb), M_DEVBUF, M_INTWAIT);
4614                 callout_handle_init(&new_ccb->ccb_h.timeout_ch);
4615                 SLIST_INSERT_HEAD(&ccb_freeq, &new_ccb->ccb_h,
4616                                   xpt_links.sle);
4617                 xpt_ccb_count++;
4618         }
4619         cam_ccbq_take_opening(&device->ccbq);
4620         SLIST_REMOVE_HEAD(&ccb_freeq, xpt_links.sle);
4621         splx(s);
4622         return (new_ccb);
4623 }
4624
4625 static void
4626 xpt_release_bus(struct cam_eb *bus)
4627 {
4628
4629         crit_enter();
4630         if (bus->refcount == 1) {
4631                 KKASSERT(TAILQ_FIRST(&bus->et_entries) == NULL);
4632                 TAILQ_REMOVE(&xpt_busses, bus, links);
4633                 if (bus->sim) {
4634                         cam_sim_release(bus->sim, 0);
4635                         bus->sim = NULL;
4636                 }
4637                 bus_generation++;
4638                 KKASSERT(bus->refcount == 1);
4639                 free(bus, M_DEVBUF);
4640         } else {
4641                 --bus->refcount;
4642         }
4643         crit_exit();
4644 }
4645
4646 static struct cam_et *
4647 xpt_alloc_target(struct cam_eb *bus, target_id_t target_id)
4648 {
4649         struct cam_et *target;
4650         struct cam_et *cur_target;
4651
4652         target = malloc(sizeof(*target), M_DEVBUF, M_INTWAIT);
4653
4654         TAILQ_INIT(&target->ed_entries);
4655         target->bus = bus;
4656         target->target_id = target_id;
4657         target->refcount = 1;
4658         target->generation = 0;
4659         timevalclear(&target->last_reset);
4660         /*
4661          * Hold a reference to our parent bus so it
4662          * will not go away before we do.
4663          */
4664         bus->refcount++;
4665
4666         /* Insertion sort into our bus's target list */
4667         cur_target = TAILQ_FIRST(&bus->et_entries);
4668         while (cur_target != NULL && cur_target->target_id < target_id)
4669                 cur_target = TAILQ_NEXT(cur_target, links);
4670
4671         if (cur_target != NULL) {
4672                 TAILQ_INSERT_BEFORE(cur_target, target, links);
4673         } else {
4674                 TAILQ_INSERT_TAIL(&bus->et_entries, target, links);
4675         }
4676         bus->generation++;
4677         return (target);
4678 }
4679
4680 static void
4681 xpt_release_target(struct cam_eb *bus, struct cam_et *target)
4682 {
4683         crit_enter();
4684         if (target->refcount == 1) {
4685                 KKASSERT(TAILQ_FIRST(&target->ed_entries) == NULL);
4686                 TAILQ_REMOVE(&bus->et_entries, target, links);
4687                 bus->generation++;
4688                 xpt_release_bus(bus);
4689                 KKASSERT(target->refcount == 1);
4690                 free(target, M_DEVBUF);
4691         } else {
4692                 --target->refcount;
4693         }
4694         crit_exit();
4695 }
4696
4697 static struct cam_ed *
4698 xpt_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id)
4699 {
4700         struct     cam_ed *device;
4701         struct     cam_devq *devq;
4702         cam_status status;
4703
4704         /* Make space for us in the device queue on our bus */
4705         devq = bus->sim->devq;
4706         status = cam_devq_resize(devq, devq->alloc_queue.array_size + 1);
4707
4708         if (status != CAM_REQ_CMP) {
4709                 device = NULL;
4710         } else {
4711                 device = malloc(sizeof(*device), M_DEVBUF, M_INTWAIT);
4712         }
4713
4714         if (device != NULL) {
4715                 struct cam_ed *cur_device;
4716
4717                 cam_init_pinfo(&device->alloc_ccb_entry.pinfo);
4718                 device->alloc_ccb_entry.device = device;
4719                 cam_init_pinfo(&device->send_ccb_entry.pinfo);
4720                 device->send_ccb_entry.device = device;
4721                 device->target = target;
4722                 device->lun_id = lun_id;
4723                 /* Initialize our queues */
4724                 if (camq_init(&device->drvq, 0) != 0) {
4725                         free(device, M_DEVBUF);
4726                         return (NULL);
4727                 }
4728                 if (cam_ccbq_init(&device->ccbq,
4729                                   bus->sim->max_dev_openings) != 0) {
4730                         camq_fini(&device->drvq);
4731                         free(device, M_DEVBUF);
4732                         return (NULL);
4733                 }
4734                 SLIST_INIT(&device->asyncs);
4735                 SLIST_INIT(&device->periphs);
4736                 device->generation = 0;
4737                 device->owner = NULL;
4738                 /*
4739                  * Take the default quirk entry until we have inquiry
4740                  * data and can determine a better quirk to use.
4741                  */
4742                 device->quirk = &xpt_quirk_table[xpt_quirk_table_size - 1];
4743                 bzero(&device->inq_data, sizeof(device->inq_data));
4744                 device->inq_flags = 0;
4745                 device->queue_flags = 0;
4746                 device->serial_num = NULL;
4747                 device->serial_num_len = 0;
4748                 device->qfrozen_cnt = 0;
4749                 device->flags = CAM_DEV_UNCONFIGURED;
4750                 device->tag_delay_count = 0;
4751                 device->refcount = 1;
4752                 callout_handle_init(&device->c_handle);
4753
4754                 /*
4755                  * Hold a reference to our parent target so it
4756                  * will not go away before we do.
4757                  */
4758                 target->refcount++;
4759
4760                 /*
4761                  * XXX should be limited by number of CCBs this bus can
4762                  * do.
4763                  */
4764                 xpt_max_ccbs += device->ccbq.devq_openings;
4765                 /* Insertion sort into our target's device list */
4766                 cur_device = TAILQ_FIRST(&target->ed_entries);
4767                 while (cur_device != NULL && cur_device->lun_id < lun_id)
4768                         cur_device = TAILQ_NEXT(cur_device, links);
4769                 if (cur_device != NULL) {
4770                         TAILQ_INSERT_BEFORE(cur_device, device, links);
4771                 } else {
4772                         TAILQ_INSERT_TAIL(&target->ed_entries, device, links);
4773                 }
4774                 target->generation++;
4775         }
4776         return (device);
4777 }
4778
4779 static void
4780 xpt_reference_device(struct cam_ed *device)
4781 {
4782         ++device->refcount;
4783 }
4784
4785 static void
4786 xpt_release_device(struct cam_eb *bus, struct cam_et *target,
4787                    struct cam_ed *device)
4788 {
4789         struct cam_devq *devq;
4790
4791         crit_enter();
4792         if (device->refcount == 1) {
4793                 KKASSERT(device->flags & CAM_DEV_UNCONFIGURED);
4794
4795                 if (device->alloc_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX
4796                  || device->send_ccb_entry.pinfo.index != CAM_UNQUEUED_INDEX)
4797                         panic("Removing device while still queued for ccbs");
4798
4799                 if ((device->flags & CAM_DEV_REL_TIMEOUT_PENDING) != 0) {
4800                         device->flags &= ~CAM_DEV_REL_TIMEOUT_PENDING;
4801                         untimeout(xpt_release_devq_timeout, device,
4802                                   device->c_handle);
4803                 }
4804
4805                 TAILQ_REMOVE(&target->ed_entries, device,links);
4806                 target->generation++;
4807                 xpt_max_ccbs -= device->ccbq.devq_openings;
4808                 /* Release our slot in the devq */
4809                 devq = bus->sim->devq;
4810                 cam_devq_resize(devq, devq->alloc_queue.array_size - 1);
4811                 xpt_release_target(bus, target);
4812                 KKASSERT(device->refcount == 1);
4813                 free(device, M_DEVBUF);
4814         } else {
4815                 --device->refcount;
4816         }
4817         crit_exit();
4818 }
4819
4820 static u_int32_t
4821 xpt_dev_ccbq_resize(struct cam_path *path, int newopenings)
4822 {
4823         int     s;
4824         int     diff;
4825         int     result;
4826         struct  cam_ed *dev;
4827
4828         dev = path->device;
4829         s = splsoftcam();
4830
4831         diff = newopenings - (dev->ccbq.dev_active + dev->ccbq.dev_openings);
4832         result = cam_ccbq_resize(&dev->ccbq, newopenings);
4833         if (result == CAM_REQ_CMP && (diff < 0)) {
4834                 dev->flags |= CAM_DEV_RESIZE_QUEUE_NEEDED;
4835         }
4836         /* Adjust the global limit */
4837         xpt_max_ccbs += diff;
4838         splx(s);
4839         return (result);
4840 }
4841
4842 static struct cam_eb *
4843 xpt_find_bus(path_id_t path_id)
4844 {
4845         struct cam_eb *bus;
4846
4847         for (bus = TAILQ_FIRST(&xpt_busses);
4848              bus != NULL;
4849              bus = TAILQ_NEXT(bus, links)) {
4850                 if (bus->path_id == path_id) {
4851                         bus->refcount++;
4852                         break;
4853                 }
4854         }
4855         return (bus);
4856 }
4857
4858 static struct cam_et *
4859 xpt_find_target(struct cam_eb *bus, target_id_t target_id)
4860 {
4861         struct cam_et *target;
4862
4863         for (target = TAILQ_FIRST(&bus->et_entries);
4864              target != NULL;
4865              target = TAILQ_NEXT(target, links)) {
4866                 if (target->target_id == target_id) {
4867                         target->refcount++;
4868                         break;
4869                 }
4870         }
4871         return (target);
4872 }
4873
4874 static struct cam_ed *
4875 xpt_find_device(struct cam_et *target, lun_id_t lun_id)
4876 {
4877         struct cam_ed *device;
4878
4879         for (device = TAILQ_FIRST(&target->ed_entries);
4880              device != NULL;
4881              device = TAILQ_NEXT(device, links)) {
4882                 if (device->lun_id == lun_id) {
4883                         device->refcount++;
4884                         break;
4885                 }
4886         }
4887         return (device);
4888 }
4889
4890 typedef struct {
4891         union   ccb *request_ccb;
4892         struct  ccb_pathinq *cpi;
4893         int     pending_count;
4894 } xpt_scan_bus_info;
4895
4896 /*
4897  * To start a scan, request_ccb is an XPT_SCAN_BUS ccb.
4898  * As the scan progresses, xpt_scan_bus is used as the
4899  * callback on completion function.
4900  */
4901 static void
4902 xpt_scan_bus(struct cam_periph *periph, union ccb *request_ccb)
4903 {
4904         CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE,
4905                   ("xpt_scan_bus\n"));
4906         switch (request_ccb->ccb_h.func_code) {
4907         case XPT_SCAN_BUS:
4908         {
4909                 xpt_scan_bus_info *scan_info;
4910                 union   ccb *work_ccb;
4911                 struct  cam_path *path;
4912                 u_int   i;
4913                 u_int   max_target;
4914                 u_int   initiator_id;
4915
4916                 /* Find out the characteristics of the bus */
4917                 work_ccb = xpt_alloc_ccb();
4918                 xpt_setup_ccb(&work_ccb->ccb_h, request_ccb->ccb_h.path,
4919                               request_ccb->ccb_h.pinfo.priority);
4920                 work_ccb->ccb_h.func_code = XPT_PATH_INQ;
4921                 xpt_action(work_ccb);
4922                 if (work_ccb->ccb_h.status != CAM_REQ_CMP) {
4923                         request_ccb->ccb_h.status = work_ccb->ccb_h.status;
4924                         xpt_free_ccb(work_ccb);
4925                         xpt_done(request_ccb);
4926                         return;
4927                 }
4928
4929                 if ((work_ccb->cpi.hba_misc & PIM_NOINITIATOR) != 0) {
4930                         /*
4931                          * Can't scan the bus on an adapter that
4932                          * cannot perform the initiator role.
4933                          */
4934                         request_ccb->ccb_h.status = CAM_REQ_CMP;
4935                         xpt_free_ccb(work_ccb);
4936                         xpt_done(request_ccb);
4937                         return;
4938                 }
4939
4940                 /* Save some state for use while we probe for devices */
4941                 scan_info = (xpt_scan_bus_info *)
4942                     malloc(sizeof(xpt_scan_bus_info), M_TEMP, M_INTWAIT);
4943                 scan_info->request_ccb = request_ccb;
4944                 scan_info->cpi = &work_ccb->cpi;
4945
4946                 /* Cache on our stack so we can work asynchronously */
4947                 max_target = scan_info->cpi->max_target;
4948                 initiator_id = scan_info->cpi->initiator_id;
4949
4950                 /*
4951                  * Don't count the initiator if the
4952                  * initiator is addressable.
4953                  */
4954                 scan_info->pending_count = max_target + 1;
4955                 if (initiator_id <= max_target)
4956                         scan_info->pending_count--;
4957
4958                 for (i = 0; i <= max_target; i++) {
4959                         cam_status status;
4960                         if (i == initiator_id)
4961                                 continue;
4962
4963                         status = xpt_create_path(&path, xpt_periph,
4964                                                  request_ccb->ccb_h.path_id,
4965                                                  i, 0);
4966                         if (status != CAM_REQ_CMP) {
4967                                 printf("xpt_scan_bus: xpt_create_path failed"
4968                                        " with status %#x, bus scan halted\n",
4969                                        status);
4970                                 break;
4971                         }
4972                         work_ccb = xpt_alloc_ccb();
4973                         xpt_setup_ccb(&work_ccb->ccb_h, path,
4974                                       request_ccb->ccb_h.pinfo.priority);
4975                         work_ccb->ccb_h.func_code = XPT_SCAN_LUN;
4976                         work_ccb->ccb_h.cbfcnp = xpt_scan_bus;
4977                         work_ccb->ccb_h.ppriv_ptr0 = scan_info;
4978                         work_ccb->crcn.flags = request_ccb->crcn.flags;
4979 #if 0
4980                         printf("xpt_scan_bus: probing %d:%d:%d\n",
4981                                 request_ccb->ccb_h.path_id, i, 0);
4982 #endif
4983                         xpt_action(work_ccb);
4984                 }
4985                 break;
4986         }
4987         case XPT_SCAN_LUN:
4988         {
4989                 xpt_scan_bus_info *scan_info;
4990                 path_id_t path_id;
4991                 target_id_t target_id;
4992                 lun_id_t lun_id;
4993
4994                 /* Reuse the same CCB to query if a device was really found */
4995                 scan_info = (xpt_scan_bus_info *)request_ccb->ccb_h.ppriv_ptr0;
4996                 xpt_setup_ccb(&request_ccb->ccb_h, request_ccb->ccb_h.path,
4997                               request_ccb->ccb_h.pinfo.priority);
4998                 request_ccb->ccb_h.func_code = XPT_GDEV_TYPE;
4999
5000                 path_id = request_ccb->ccb_h.path_id;
5001                 target_id = request_ccb->ccb_h.target_id;
5002                 lun_id = request_ccb->ccb_h.target_lun;
5003                 xpt_action(request_ccb);
5004
5005 #if 0
5006                 printf("xpt_scan_bus: got back probe from %d:%d:%d\n",
5007                         path_id, target_id, lun_id);
5008 #endif
5009
5010                 if (request_ccb->ccb_h.status != CAM_REQ_CMP) {
5011                         struct cam_ed *device;
5012                         struct cam_et *target;
5013                         int s, phl;
5014
5015                         /*
5016                          * If we already probed lun 0 successfully, or
5017                          * we have additional configured luns on this
5018                          * target that might have "gone away", go onto
5019                          * the next lun.
5020                          */
5021                         target = request_ccb->ccb_h.path->target;
5022                         /*
5023                          * We may touch devices that we don't
5024                          * hold references too, so ensure they
5025                          * don't disappear out from under us.
5026                          * The target above is referenced by the
5027                          * path in the request ccb.
5028                          */
5029                         phl = 0;
5030                         s = splcam();
5031                         device = TAILQ_FIRST(&target->ed_entries);
5032                         if (device != NULL) {
5033                                 phl = device->quirk->quirks & CAM_QUIRK_HILUNS;
5034                                 if (device->lun_id == 0)
5035                                         device = TAILQ_NEXT(device, links);
5036                         }
5037                         splx(s);
5038                         if ((lun_id != 0) || (device != NULL)) {
5039                                 if (lun_id < (CAM_SCSI2_MAXLUN-1) || phl)
5040                                         lun_id++;
5041                         }
5042                 } else {
5043                         struct cam_ed *device;
5044
5045                         device = request_ccb->ccb_h.path->device;
5046
5047                         if ((device->quirk->quirks & CAM_QUIRK_NOLUNS) == 0) {
5048                                 /* Try the next lun */
5049                                 if (lun_id < (CAM_SCSI2_MAXLUN-1) ||
5050                                     (device->quirk->quirks & CAM_QUIRK_HILUNS))
5051                                         lun_id++;
5052                         }
5053                 }
5054
5055                 xpt_free_path(request_ccb->ccb_h.path);
5056
5057                 /* Check Bounds */
5058                 if ((lun_id == request_ccb->ccb_h.target_lun)
5059                  || lun_id > scan_info->cpi->max_lun) {
5060                         /* We're done */
5061
5062                         xpt_free_ccb(request_ccb);
5063                         scan_info->pending_count--;
5064                         if (scan_info->pending_count == 0) {
5065                                 xpt_free_ccb((union ccb *)scan_info->cpi);
5066                                 request_ccb = scan_info->request_ccb;
5067                                 free(scan_info, M_TEMP);
5068                                 request_ccb->ccb_h.status = CAM_REQ_CMP;
5069                                 xpt_done(request_ccb);
5070                         }
5071                 } else {
5072                         /* Try the next device */
5073                         struct cam_path *path;
5074                         cam_status status;
5075
5076                         path = request_ccb->ccb_h.path;
5077                         status = xpt_create_path(&path, xpt_periph,
5078                                                  path_id, target_id, lun_id);
5079                         if (status != CAM_REQ_CMP) {
5080                                 printf("xpt_scan_bus: xpt_create_path failed "
5081                                        "with status %#x, halting LUN scan\n",
5082                                        status);
5083                                 xpt_free_ccb(request_ccb);
5084                                 scan_info->pending_count--;
5085                                 if (scan_info->pending_count == 0) {
5086                                         xpt_free_ccb(
5087                                                 (union ccb *)scan_info->cpi);
5088                                         request_ccb = scan_info->request_ccb;
5089                                         free(scan_info, M_TEMP);
5090                                         request_ccb->ccb_h.status = CAM_REQ_CMP;
5091                                         xpt_done(request_ccb);
5092                                         break;
5093                                 }
5094                         }
5095                         xpt_setup_ccb(&request_ccb->ccb_h, path,
5096                                       request_ccb->ccb_h.pinfo.priority);
5097                         request_ccb->ccb_h.func_code = XPT_SCAN_LUN;
5098                         request_ccb->ccb_h.cbfcnp = xpt_scan_bus;
5099                         request_ccb->ccb_h.ppriv_ptr0 = scan_info;
5100                         request_ccb->crcn.flags =
5101                                 scan_info->request_ccb->crcn.flags;
5102 #if 0
5103                         xpt_print_path(path);
5104                         printf("xpt_scan bus probing\n");
5105 #endif
5106                         xpt_action(request_ccb);
5107                 }
5108                 break;
5109         }
5110         default:
5111                 break;
5112         }
5113 }
5114
5115 typedef enum {
5116         PROBE_TUR,
5117         PROBE_INQUIRY,
5118         PROBE_FULL_INQUIRY,
5119         PROBE_MODE_SENSE,
5120         PROBE_SERIAL_NUM,
5121         PROBE_TUR_FOR_NEGOTIATION
5122 } probe_action;
5123
5124 typedef enum {
5125         PROBE_INQUIRY_CKSUM     = 0x01,
5126         PROBE_SERIAL_CKSUM      = 0x02,
5127         PROBE_NO_ANNOUNCE       = 0x04
5128 } probe_flags;
5129
5130 typedef struct {
5131         TAILQ_HEAD(, ccb_hdr) request_ccbs;
5132         probe_action    action;
5133         union ccb       saved_ccb;
5134         probe_flags     flags;
5135         MD5_CTX         context;
5136         u_int8_t        digest[16];
5137 } probe_softc;
5138
5139 static void
5140 xpt_scan_lun(struct cam_periph *periph, struct cam_path *path,
5141              cam_flags flags, union ccb *request_ccb)
5142 {
5143         struct ccb_pathinq cpi;
5144         cam_status status;
5145         struct cam_path *new_path;
5146         struct cam_periph *old_periph;
5147         int s;
5148
5149         CAM_DEBUG(request_ccb->ccb_h.path, CAM_DEBUG_TRACE,
5150                   ("xpt_scan_lun\n"));
5151
5152         xpt_setup_ccb(&cpi.ccb_h, path, /*priority*/1);
5153         cpi.ccb_h.func_code = XPT_PATH_INQ;
5154         xpt_action((union ccb *)&cpi);
5155
5156         if (cpi.ccb_h.status != CAM_REQ_CMP) {
5157                 if (request_ccb != NULL) {
5158                         request_ccb->ccb_h.status = cpi.ccb_h.status;
5159                         xpt_done(request_ccb);
5160                 }
5161                 return;
5162         }
5163
5164         if ((cpi.hba_misc & PIM_NOINITIATOR) != 0) {
5165                 /*
5166                  * Can't scan the bus on an adapter that
5167                  * cannot perform the initiator role.
5168                  */
5169                 if (request_ccb != NULL) {
5170                         request_ccb->ccb_h.status = CAM_REQ_CMP;
5171                         xpt_done(request_ccb);
5172                 }
5173                 return;
5174         }
5175
5176         if (request_ccb == NULL) {
5177                 request_ccb = malloc(sizeof(union ccb), M_TEMP, M_INTWAIT);
5178                 new_path = malloc(sizeof(*new_path), M_TEMP, M_INTWAIT);
5179                 status = xpt_compile_path(new_path, xpt_periph,
5180                                           path->bus->path_id,
5181                                           path->target->target_id,
5182                                           path->device->lun_id);
5183
5184                 if (status != CAM_REQ_CMP) {
5185                         xpt_print_path(path);
5186                         printf("xpt_scan_lun: can't compile path, can't "
5187                                "continue\n");
5188                         free(request_ccb, M_TEMP);
5189                         free(new_path, M_TEMP);
5190                         return;
5191                 }
5192                 xpt_setup_ccb(&request_ccb->ccb_h, new_path, /*priority*/ 1);
5193                 request_ccb->ccb_h.cbfcnp = xptscandone;
5194                 request_ccb->ccb_h.func_code = XPT_SCAN_LUN;
5195                 request_ccb->crcn.flags = flags;
5196         }
5197
5198         s = splsoftcam();
5199         if ((old_periph = cam_periph_find(path, "probe")) != NULL) {
5200                 probe_softc *softc;
5201
5202                 softc = (probe_softc *)old_periph->softc;
5203                 TAILQ_INSERT_TAIL(&softc->request_ccbs, &request_ccb->ccb_h,
5204                                   periph_links.tqe);
5205         } else {
5206                 status = cam_periph_alloc(proberegister, NULL, probecleanup,
5207                                           probestart, "probe",
5208                                           CAM_PERIPH_BIO,
5209                                           request_ccb->ccb_h.path, NULL, 0,
5210                                           request_ccb);
5211
5212                 if (status != CAM_REQ_CMP) {
5213                         xpt_print_path(path);
5214                         printf("xpt_scan_lun: cam_alloc_periph returned an "
5215                                "error, can't continue probe\n");
5216                         request_ccb->ccb_h.status = status;
5217                         xpt_done(request_ccb);
5218                 }
5219         }
5220         splx(s);
5221 }
5222
5223 static void
5224 xptscandone(struct cam_periph *periph, union ccb *done_ccb)
5225 {
5226         xpt_release_path(done_ccb->ccb_h.path);
5227         free(done_ccb->ccb_h.path, M_TEMP);
5228         free(done_ccb, M_TEMP);
5229 }
5230
5231 static cam_status
5232 proberegister(struct cam_periph *periph, void *arg)
5233 {
5234         union ccb *request_ccb; /* CCB representing the probe request */
5235         probe_softc *softc;
5236
5237         request_ccb = (union ccb *)arg;
5238         if (periph == NULL) {
5239                 printf("proberegister: periph was NULL!!\n");
5240                 return(CAM_REQ_CMP_ERR);
5241         }
5242
5243         if (request_ccb == NULL) {
5244                 printf("proberegister: no probe CCB, "
5245                        "can't register device\n");
5246                 return(CAM_REQ_CMP_ERR);
5247         }
5248
5249         softc = malloc(sizeof(*softc), M_TEMP, M_INTWAIT | M_ZERO);
5250         TAILQ_INIT(&softc->request_ccbs);
5251         TAILQ_INSERT_TAIL(&softc->request_ccbs, &request_ccb->ccb_h,
5252                           periph_links.tqe);
5253         softc->flags = 0;
5254         periph->softc = softc;
5255         cam_periph_acquire(periph);
5256         /*
5257          * Ensure we've waited at least a bus settle
5258          * delay before attempting to probe the device.
5259          * For HBAs that don't do bus resets, this won't make a difference.
5260          */
5261         cam_periph_freeze_after_event(periph, &periph->path->bus->last_reset,
5262                                       SCSI_DELAY);
5263         probeschedule(periph);
5264         return(CAM_REQ_CMP);
5265 }
5266
5267 static void
5268 probeschedule(struct cam_periph *periph)
5269 {
5270         struct ccb_pathinq cpi;
5271         union ccb *ccb;
5272         probe_softc *softc;
5273
5274         softc = (probe_softc *)periph->softc;
5275         ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs);
5276
5277         xpt_setup_ccb(&cpi.ccb_h, periph->path, /*priority*/1);
5278         cpi.ccb_h.func_code = XPT_PATH_INQ;
5279         xpt_action((union ccb *)&cpi);
5280
5281         /*
5282          * If a device has gone away and another device, or the same one,
5283          * is back in the same place, it should have a unit attention
5284          * condition pending.  It will not report the unit attention in
5285          * response to an inquiry, which may leave invalid transfer
5286          * negotiations in effect.  The TUR will reveal the unit attention
5287          * condition.  Only send the TUR for lun 0, since some devices
5288          * will get confused by commands other than inquiry to non-existent
5289          * luns.  If you think a device has gone away start your scan from
5290          * lun 0.  This will insure that any bogus transfer settings are
5291          * invalidated.
5292          *
5293          * If we haven't seen the device before and the controller supports
5294          * some kind of transfer negotiation, negotiate with the first
5295          * sent command if no bus reset was performed at startup.  This
5296          * ensures that the device is not confused by transfer negotiation
5297          * settings left over by loader or BIOS action.
5298          */
5299         if (((ccb->ccb_h.path->device->flags & CAM_DEV_UNCONFIGURED) == 0)
5300          && (ccb->ccb_h.target_lun == 0)) {
5301                 softc->action = PROBE_TUR;
5302         } else if ((cpi.hba_inquiry & (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE)) != 0
5303               && (cpi.hba_misc & PIM_NOBUSRESET) != 0) {
5304                 proberequestdefaultnegotiation(periph);
5305                 softc->action = PROBE_INQUIRY;
5306         } else {
5307                 softc->action = PROBE_INQUIRY;
5308         }
5309
5310         if (ccb->crcn.flags & CAM_EXPECT_INQ_CHANGE)
5311                 softc->flags |= PROBE_NO_ANNOUNCE;
5312         else
5313                 softc->flags &= ~PROBE_NO_ANNOUNCE;
5314
5315         xpt_schedule(periph, ccb->ccb_h.pinfo.priority);
5316 }
5317
5318 static void
5319 probestart(struct cam_periph *periph, union ccb *start_ccb)
5320 {
5321         /* Probe the device that our peripheral driver points to */
5322         struct ccb_scsiio *csio;
5323         probe_softc *softc;
5324
5325         CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probestart\n"));
5326
5327         softc = (probe_softc *)periph->softc;
5328         csio = &start_ccb->csio;
5329
5330         switch (softc->action) {
5331         case PROBE_TUR:
5332         case PROBE_TUR_FOR_NEGOTIATION:
5333         {
5334                 scsi_test_unit_ready(csio,
5335                                      /*retries*/4,
5336                                      probedone,
5337                                      MSG_SIMPLE_Q_TAG,
5338                                      SSD_FULL_SIZE,
5339                                      /*timeout*/60000);
5340                 break;
5341         }
5342         case PROBE_INQUIRY:
5343         case PROBE_FULL_INQUIRY:
5344         {
5345                 u_int inquiry_len;
5346                 struct scsi_inquiry_data *inq_buf;
5347
5348                 inq_buf = &periph->path->device->inq_data;
5349                 /*
5350                  * If the device is currently configured, we calculate an
5351                  * MD5 checksum of the inquiry data, and if the serial number
5352                  * length is greater than 0, add the serial number data
5353                  * into the checksum as well.  Once the inquiry and the
5354                  * serial number check finish, we attempt to figure out
5355                  * whether we still have the same device.
5356                  */
5357                 if ((periph->path->device->flags & CAM_DEV_UNCONFIGURED) == 0) {
5358
5359                         MD5Init(&softc->context);
5360                         MD5Update(&softc->context, (unsigned char *)inq_buf,
5361                                   sizeof(struct scsi_inquiry_data));
5362                         softc->flags |= PROBE_INQUIRY_CKSUM;
5363                         if (periph->path->device->serial_num_len > 0) {
5364                                 MD5Update(&softc->context,
5365                                           periph->path->device->serial_num,
5366                                           periph->path->device->serial_num_len);
5367                                 softc->flags |= PROBE_SERIAL_CKSUM;
5368                         }
5369                         MD5Final(softc->digest, &softc->context);
5370                 }
5371
5372                 if (softc->action == PROBE_INQUIRY)
5373                         inquiry_len = SHORT_INQUIRY_LENGTH;
5374                 else
5375                         inquiry_len = inq_buf->additional_length + 5;
5376
5377                 scsi_inquiry(csio,
5378                              /*retries*/4,
5379                              probedone,
5380                              MSG_SIMPLE_Q_TAG,
5381                              (u_int8_t *)inq_buf,
5382                              inquiry_len,
5383                              /*evpd*/FALSE,
5384                              /*page_code*/0,
5385                              SSD_MIN_SIZE,
5386                              /*timeout*/60 * 1000);
5387                 break;
5388         }
5389         case PROBE_MODE_SENSE:
5390         {
5391                 void  *mode_buf;
5392                 int    mode_buf_len;
5393
5394                 mode_buf_len = sizeof(struct scsi_mode_header_6)
5395                              + sizeof(struct scsi_mode_blk_desc)
5396                              + sizeof(struct scsi_control_page);
5397                 mode_buf = malloc(mode_buf_len, M_TEMP, M_INTWAIT);
5398                 scsi_mode_sense(csio,
5399                                 /*retries*/4,
5400                                 probedone,
5401                                 MSG_SIMPLE_Q_TAG,
5402                                 /*dbd*/FALSE,
5403                                 SMS_PAGE_CTRL_CURRENT,
5404                                 SMS_CONTROL_MODE_PAGE,
5405                                 mode_buf,
5406                                 mode_buf_len,
5407                                 SSD_FULL_SIZE,
5408                                 /*timeout*/60000);
5409                 break;
5410         }
5411         case PROBE_SERIAL_NUM:
5412         {
5413                 struct scsi_vpd_unit_serial_number *serial_buf;
5414                 struct cam_ed* device;
5415
5416                 serial_buf = NULL;
5417                 device = periph->path->device;
5418                 device->serial_num = NULL;
5419                 device->serial_num_len = 0;
5420
5421                 if ((device->quirk->quirks & CAM_QUIRK_NOSERIAL) == 0) {
5422                         serial_buf = malloc(sizeof(*serial_buf), M_TEMP,
5423                                             M_INTWAIT | M_ZERO);
5424                         scsi_inquiry(csio,
5425                                      /*retries*/4,
5426                                      probedone,
5427                                      MSG_SIMPLE_Q_TAG,
5428                                      (u_int8_t *)serial_buf,
5429                                      sizeof(*serial_buf),
5430                                      /*evpd*/TRUE,
5431                                      SVPD_UNIT_SERIAL_NUMBER,
5432                                      SSD_MIN_SIZE,
5433                                      /*timeout*/60 * 1000);
5434                         break;
5435                 }
5436                 /*
5437                  * We'll have to do without, let our probedone
5438                  * routine finish up for us.
5439                  */
5440                 start_ccb->csio.data_ptr = NULL;
5441                 probedone(periph, start_ccb);
5442                 return;
5443         }
5444         }
5445         xpt_action(start_ccb);
5446 }
5447
5448 static void
5449 proberequestdefaultnegotiation(struct cam_periph *periph)
5450 {
5451         struct ccb_trans_settings cts;
5452
5453         xpt_setup_ccb(&cts.ccb_h, periph->path, /*priority*/1);
5454         cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS;
5455         cts.flags = CCB_TRANS_USER_SETTINGS;
5456         xpt_action((union ccb *)&cts);
5457         cts.ccb_h.func_code = XPT_SET_TRAN_SETTINGS;
5458         cts.flags &= ~CCB_TRANS_USER_SETTINGS;
5459         cts.flags |= CCB_TRANS_CURRENT_SETTINGS;
5460         xpt_action((union ccb *)&cts);
5461 }
5462
5463 static void
5464 probedone(struct cam_periph *periph, union ccb *done_ccb)
5465 {
5466         probe_softc *softc;
5467         struct cam_path *path;
5468         u_int32_t  priority;
5469
5470         CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("probedone\n"));
5471
5472         softc = (probe_softc *)periph->softc;
5473         path = done_ccb->ccb_h.path;
5474         priority = done_ccb->ccb_h.pinfo.priority;
5475
5476         switch (softc->action) {
5477         case PROBE_TUR:
5478         {
5479                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
5480
5481                         if (cam_periph_error(done_ccb, 0,
5482                                              SF_NO_PRINT, NULL) == ERESTART)
5483                                 return;
5484                         else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0)
5485                                 /* Don't wedge the queue */
5486                                 xpt_release_devq(done_ccb->ccb_h.path,
5487                                                  /*count*/1,
5488                                                  /*run_queue*/TRUE);
5489                 }
5490                 softc->action = PROBE_INQUIRY;
5491                 xpt_release_ccb(done_ccb);
5492                 xpt_schedule(periph, priority);
5493                 return;
5494         }
5495         case PROBE_INQUIRY:
5496         case PROBE_FULL_INQUIRY:
5497         {
5498                 if ((done_ccb->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) {
5499                         struct scsi_inquiry_data *inq_buf;
5500                         u_int8_t periph_qual;
5501
5502                         path->device->flags |= CAM_DEV_INQUIRY_DATA_VALID;
5503                         inq_buf = &path->device->inq_data;
5504
5505                         periph_qual = SID_QUAL(inq_buf);
5506
5507                         switch(periph_qual) {
5508                         case SID_QUAL_LU_CONNECTED:
5509                         {
5510                                 u_int8_t alen;
5511
5512                                 /*
5513                                  * We conservatively request only
5514                                  * SHORT_INQUIRY_LEN bytes of inquiry
5515                                  * information during our first try
5516                                  * at sending an INQUIRY. If the device
5517                                  * has more information to give,
5518                                  * perform a second request specifying
5519                                  * the amount of information the device
5520                                  * is willing to give.
5521                                  */
5522                                 alen = inq_buf->additional_length;
5523                                 if (softc->action == PROBE_INQUIRY
5524                                  && alen > (SHORT_INQUIRY_LENGTH - 5)) {
5525                                         softc->action = PROBE_FULL_INQUIRY;
5526                                         xpt_release_ccb(done_ccb);
5527                                         xpt_schedule(periph, priority);
5528                                         return;
5529                                 }
5530
5531                                 xpt_find_quirk(path->device);
5532
5533                                 if ((inq_buf->flags & SID_CmdQue) != 0)
5534                                         softc->action = PROBE_MODE_SENSE;
5535                                 else
5536                                         softc->action = PROBE_SERIAL_NUM;
5537
5538                                 path->device->flags &= ~CAM_DEV_UNCONFIGURED;
5539                                 xpt_reference_device(path->device);
5540
5541                                 xpt_release_ccb(done_ccb);
5542                                 xpt_schedule(periph, priority);
5543                                 return;
5544                         }
5545                         default:
5546                                 break;
5547                         }
5548                 } else if (cam_periph_error(done_ccb, 0,
5549                                             done_ccb->ccb_h.target_lun > 0
5550                                             ? SF_RETRY_UA|SF_QUIET_IR
5551                                             : SF_RETRY_UA,
5552                                             &softc->saved_ccb) == ERESTART) {
5553                         return;
5554                 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
5555                         /* Don't wedge the queue */
5556                         xpt_release_devq(done_ccb->ccb_h.path, /*count*/1,
5557                                          /*run_queue*/TRUE);
5558                 }
5559                 /*
5560                  * If we get to this point, we got an error status back
5561                  * from the inquiry and the error status doesn't require
5562                  * automatically retrying the command.  Therefore, the
5563                  * inquiry failed.  If we had inquiry information before
5564                  * for this device, but this latest inquiry command failed,
5565                  * the device has probably gone away.  If this device isn't
5566                  * already marked unconfigured, notify the peripheral
5567                  * drivers that this device is no more.
5568                  */
5569                 if ((path->device->flags & CAM_DEV_UNCONFIGURED) == 0) {
5570                         /* Send the async notification. */
5571                         xpt_async(AC_LOST_DEVICE, path, NULL);
5572                 }
5573
5574                 xpt_release_ccb(done_ccb);
5575                 break;
5576         }
5577         case PROBE_MODE_SENSE:
5578         {
5579                 struct ccb_scsiio *csio;
5580                 struct scsi_mode_header_6 *mode_hdr;
5581
5582                 csio = &done_ccb->csio;
5583                 mode_hdr = (struct scsi_mode_header_6 *)csio->data_ptr;
5584                 if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP) {
5585                         struct scsi_control_page *page;
5586                         u_int8_t *offset;
5587
5588                         offset = ((u_int8_t *)&mode_hdr[1])
5589                             + mode_hdr->blk_desc_len;
5590                         page = (struct scsi_control_page *)offset;
5591                         path->device->queue_flags = page->queue_flags;
5592                 } else if (cam_periph_error(done_ccb, 0,
5593                                             SF_RETRY_UA|SF_NO_PRINT,
5594                                             &softc->saved_ccb) == ERESTART) {
5595                         return;
5596                 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
5597                         /* Don't wedge the queue */
5598                         xpt_release_devq(done_ccb->ccb_h.path,
5599                                          /*count*/1, /*run_queue*/TRUE);
5600                 }
5601                 xpt_release_ccb(done_ccb);
5602                 free(mode_hdr, M_TEMP);
5603                 softc->action = PROBE_SERIAL_NUM;
5604                 xpt_schedule(periph, priority);
5605                 return;
5606         }
5607         case PROBE_SERIAL_NUM:
5608         {
5609                 struct ccb_scsiio *csio;
5610                 struct scsi_vpd_unit_serial_number *serial_buf;
5611                 u_int32_t  priority;
5612                 int changed;
5613                 int have_serialnum;
5614
5615                 changed = 1;
5616                 have_serialnum = 0;
5617                 csio = &done_ccb->csio;
5618                 priority = done_ccb->ccb_h.pinfo.priority;
5619                 serial_buf =
5620                     (struct scsi_vpd_unit_serial_number *)csio->data_ptr;
5621
5622                 /* Clean up from previous instance of this device */
5623                 if (path->device->serial_num != NULL) {
5624                         free(path->device->serial_num, M_DEVBUF);
5625                         path->device->serial_num = NULL;
5626                         path->device->serial_num_len = 0;
5627                 }
5628
5629                 if (serial_buf == NULL) {
5630                         /*
5631                          * Don't process the command as it was never sent
5632                          */
5633                 } else if ((csio->ccb_h.status & CAM_STATUS_MASK) == CAM_REQ_CMP
5634                         && (serial_buf->length > 0)) {
5635
5636                         have_serialnum = 1;
5637                         path->device->serial_num =
5638                                 malloc((serial_buf->length + 1),
5639                                        M_DEVBUF, M_INTWAIT);
5640                         bcopy(serial_buf->serial_num,
5641                               path->device->serial_num,
5642                               serial_buf->length);
5643                         path->device->serial_num_len = serial_buf->length;
5644                         path->device->serial_num[serial_buf->length] = '\0';
5645                 } else if (cam_periph_error(done_ccb, 0,
5646                                             SF_RETRY_UA|SF_NO_PRINT,
5647                                             &softc->saved_ccb) == ERESTART) {
5648                         return;
5649                 } else if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
5650                         /* Don't wedge the queue */
5651                         xpt_release_devq(done_ccb->ccb_h.path, /*count*/1,
5652                                          /*run_queue*/TRUE);
5653                 }
5654
5655                 /*
5656                  * Let's see if we have seen this device before.
5657                  */
5658                 if ((softc->flags & PROBE_INQUIRY_CKSUM) != 0) {
5659                         MD5_CTX context;
5660                         u_int8_t digest[16];
5661
5662                         MD5Init(&context);
5663
5664                         MD5Update(&context,
5665                                   (unsigned char *)&path->device->inq_data,
5666                                   sizeof(struct scsi_inquiry_data));
5667
5668                         if (have_serialnum)
5669                                 MD5Update(&context, serial_buf->serial_num,
5670                                           serial_buf->length);
5671
5672                         MD5Final(digest, &context);
5673                         if (bcmp(softc->digest, digest, 16) == 0)
5674                                 changed = 0;
5675
5676                         /*
5677                          * XXX Do we need to do a TUR in order to ensure
5678                          *     that the device really hasn't changed???
5679                          */
5680                         if ((changed != 0)
5681                          && ((softc->flags & PROBE_NO_ANNOUNCE) == 0))
5682                                 xpt_async(AC_LOST_DEVICE, path, NULL);
5683                 }
5684                 if (serial_buf != NULL)
5685                         free(serial_buf, M_TEMP);
5686
5687                 if (changed != 0) {
5688                         /*
5689                          * Now that we have all the necessary
5690                          * information to safely perform transfer
5691                          * negotiations... Controllers don't perform
5692                          * any negotiation or tagged queuing until
5693                          * after the first XPT_SET_TRAN_SETTINGS ccb is
5694                          * received.  So, on a new device, just retreive
5695                          * the user settings, and set them as the current
5696                          * settings to set the device up.
5697                          */
5698                         proberequestdefaultnegotiation(periph);
5699                         xpt_release_ccb(done_ccb);
5700
5701                         /*
5702                          * Perform a TUR to allow the controller to
5703                          * perform any necessary transfer negotiation.
5704                          */
5705                         softc->action = PROBE_TUR_FOR_NEGOTIATION;
5706                         xpt_schedule(periph, priority);
5707                         return;
5708                 }
5709                 xpt_release_ccb(done_ccb);
5710                 break;
5711         }
5712         case PROBE_TUR_FOR_NEGOTIATION:
5713                 if ((done_ccb->ccb_h.status & CAM_DEV_QFRZN) != 0) {
5714                         /* Don't wedge the queue */
5715                         xpt_release_devq(done_ccb->ccb_h.path, /*count*/1,
5716                                          /*run_queue*/TRUE);
5717                 }
5718
5719                 path->device->flags &= ~CAM_DEV_UNCONFIGURED;
5720                 xpt_reference_device(path->device);
5721
5722                 if ((softc->flags & PROBE_NO_ANNOUNCE) == 0) {
5723                         /* Inform the XPT that a new device has been found */
5724                         done_ccb->ccb_h.func_code = XPT_GDEV_TYPE;
5725                         xpt_action(done_ccb);
5726
5727                         xpt_async(AC_FOUND_DEVICE, xpt_periph->path, done_ccb);
5728                 }
5729                 xpt_release_ccb(done_ccb);
5730                 break;
5731         }
5732         done_ccb = (union ccb *)TAILQ_FIRST(&softc->request_ccbs);
5733         TAILQ_REMOVE(&softc->request_ccbs, &done_ccb->ccb_h, periph_links.tqe);
5734         done_ccb->ccb_h.status = CAM_REQ_CMP;
5735         xpt_done(done_ccb);
5736         if (TAILQ_FIRST(&softc->request_ccbs) == NULL) {
5737                 cam_periph_invalidate(periph);
5738                 cam_periph_release(periph);
5739         } else {
5740                 probeschedule(periph);
5741         }
5742 }
5743
5744 static void
5745 probecleanup(struct cam_periph *periph)
5746 {
5747         free(periph->softc, M_TEMP);
5748 }
5749
5750 static void
5751 xpt_find_quirk(struct cam_ed *device)
5752 {
5753         caddr_t match;
5754
5755         match = cam_quirkmatch((caddr_t)&device->inq_data,
5756                                (caddr_t)xpt_quirk_table,
5757                                sizeof(xpt_quirk_table)/sizeof(*xpt_quirk_table),
5758                                sizeof(*xpt_quirk_table), scsi_inquiry_match);
5759
5760         if (match == NULL)
5761                 panic("xpt_find_quirk: device didn't match wildcard entry!!");
5762
5763         device->quirk = (struct xpt_quirk_entry *)match;
5764 }
5765
5766 static void
5767 xpt_set_transfer_settings(struct ccb_trans_settings *cts, struct cam_ed *device,
5768                           int async_update)
5769 {
5770         struct  cam_sim *sim;
5771         int     qfrozen;
5772
5773         sim = cts->ccb_h.path->bus->sim;
5774         if (async_update == FALSE) {
5775                 struct  scsi_inquiry_data *inq_data;
5776                 struct  ccb_pathinq cpi;
5777                 struct  ccb_trans_settings cur_cts;
5778
5779                 if (device == NULL) {
5780                         cts->ccb_h.status = CAM_PATH_INVALID;
5781                         xpt_done((union ccb *)cts);
5782                         return;
5783                 }
5784
5785                 /*
5786                  * Perform sanity checking against what the
5787                  * controller and device can do.
5788                  */
5789                 xpt_setup_ccb(&cpi.ccb_h, cts->ccb_h.path, /*priority*/1);
5790                 cpi.ccb_h.func_code = XPT_PATH_INQ;
5791                 xpt_action((union ccb *)&cpi);
5792                 xpt_setup_ccb(&cur_cts.ccb_h, cts->ccb_h.path, /*priority*/1);
5793                 cur_cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS;
5794                 cur_cts.flags = CCB_TRANS_CURRENT_SETTINGS;
5795                 xpt_action((union ccb *)&cur_cts);
5796                 inq_data = &device->inq_data;
5797
5798                 /* Fill in any gaps in what the user gave us */
5799                 if ((cts->valid & CCB_TRANS_SYNC_RATE_VALID) == 0)
5800                         cts->sync_period = cur_cts.sync_period;
5801                 if ((cts->valid & CCB_TRANS_SYNC_OFFSET_VALID) == 0)
5802                         cts->sync_offset = cur_cts.sync_offset;
5803                 if ((cts->valid & CCB_TRANS_BUS_WIDTH_VALID) == 0)
5804                         cts->bus_width = cur_cts.bus_width;
5805                 if ((cts->valid & CCB_TRANS_DISC_VALID) == 0) {
5806                         cts->flags &= ~CCB_TRANS_DISC_ENB;
5807                         cts->flags |= cur_cts.flags & CCB_TRANS_DISC_ENB;
5808                 }
5809                 if ((cts->valid & CCB_TRANS_TQ_VALID) == 0) {
5810                         cts->flags &= ~CCB_TRANS_TAG_ENB;
5811                         cts->flags |= cur_cts.flags & CCB_TRANS_TAG_ENB;
5812                 }
5813
5814                 if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0
5815                   && (inq_data->flags & SID_Sync) == 0)
5816                  || ((cpi.hba_inquiry & PI_SDTR_ABLE) == 0)
5817                  || (cts->sync_offset == 0)
5818                  || (cts->sync_period == 0)) {
5819                         /* Force async */
5820                         cts->sync_period = 0;
5821                         cts->sync_offset = 0;
5822                 } else if ((device->flags & CAM_DEV_INQUIRY_DATA_VALID) != 0) {
5823
5824                         if ((inq_data->spi3data & SID_SPI_CLOCK_DT) == 0
5825                          && cts->sync_period <= 0x9) {
5826                                 /*
5827                                  * Don't allow DT transmission rates if the
5828                                  * device does not support it.
5829                                  */
5830                                 cts->sync_period = 0xa;
5831                         }
5832                         if ((inq_data->spi3data & SID_SPI_IUS) == 0
5833                          && cts->sync_period <= 0x8) {
5834                                 /*
5835                                  * Don't allow PACE transmission rates
5836                                  * if the device does support packetized
5837                                  * transfers.
5838                                  */
5839                                 cts->sync_period = 0x9;
5840                         }
5841                 }
5842
5843                 switch (cts->bus_width) {
5844                 case MSG_EXT_WDTR_BUS_32_BIT:
5845                         if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0
5846                           || (inq_data->flags & SID_WBus32) != 0)
5847                          && (cpi.hba_inquiry & PI_WIDE_32) != 0)
5848                                 break;
5849                         /* Fall Through to 16-bit */
5850                 case MSG_EXT_WDTR_BUS_16_BIT:
5851                         if (((device->flags & CAM_DEV_INQUIRY_DATA_VALID) == 0
5852                           || (inq_data->flags & SID_WBus16) != 0)
5853                          && (cpi.hba_inquiry & PI_WIDE_16) != 0) {
5854                                 cts->bus_width = MSG_EXT_WDTR_BUS_16_BIT;
5855                                 break;
5856                         }
5857                         /* Fall Through to 8-bit */
5858                 default: /* New bus width?? */
5859                 case MSG_EXT_WDTR_BUS_8_BIT:
5860                         /* All targets can do this */
5861                         cts->bus_width = MSG_EXT_WDTR_BUS_8_BIT;
5862                         break;
5863                 }
5864
5865                 if ((cts->flags & CCB_TRANS_DISC_ENB) == 0) {
5866                         /*
5867                          * Can't tag queue without disconnection.
5868                          */
5869                         cts->flags &= ~CCB_TRANS_TAG_ENB;
5870                         cts->valid |= CCB_TRANS_TQ_VALID;
5871                 }
5872
5873                 if ((cpi.hba_inquiry & PI_TAG_ABLE) == 0
5874                  || (inq_data->flags & SID_CmdQue) == 0
5875                  || (device->queue_flags & SCP_QUEUE_DQUE) != 0
5876                  || (device->quirk->mintags == 0)) {
5877                         /*
5878                          * Can't tag on hardware that doesn't support,
5879                          * doesn't have it enabled, or has broken tag support.
5880                          */
5881                         cts->flags &= ~CCB_TRANS_TAG_ENB;
5882                 }
5883         }
5884
5885         qfrozen = FALSE;
5886         if ((cts->valid & CCB_TRANS_TQ_VALID) != 0) {
5887                 int device_tagenb;
5888
5889                 /*
5890                  * If we are transitioning from tags to no-tags or
5891                  * vice-versa, we need to carefully freeze and restart
5892                  * the queue so that we don't overlap tagged and non-tagged
5893                  * commands.  We also temporarily stop tags if there is
5894                  * a change in transfer negotiation settings to allow
5895                  * "tag-less" negotiation.
5896                  */
5897                 if ((device->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
5898                  || (device->inq_flags & SID_CmdQue) != 0)
5899                         device_tagenb = TRUE;
5900                 else
5901                         device_tagenb = FALSE;
5902
5903                 if (((cts->flags & CCB_TRANS_TAG_ENB) != 0
5904                   && device_tagenb == FALSE)
5905                  || ((cts->flags & CCB_TRANS_TAG_ENB) == 0
5906                   && device_tagenb == TRUE)) {
5907
5908                         if ((cts->flags & CCB_TRANS_TAG_ENB) != 0) {
5909                                 /*
5910                                  * Delay change to use tags until after a
5911                                  * few commands have gone to this device so
5912                                  * the controller has time to perform transfer
5913                                  * negotiations without tagged messages getting
5914                                  * in the way.
5915                                  */
5916                                 device->tag_delay_count = CAM_TAG_DELAY_COUNT;
5917                                 device->flags |= CAM_DEV_TAG_AFTER_COUNT;
5918                         } else {
5919                                 xpt_freeze_devq(cts->ccb_h.path, /*count*/1);
5920                                 qfrozen = TRUE;
5921                                 device->inq_flags &= ~SID_CmdQue;
5922                                 xpt_dev_ccbq_resize(cts->ccb_h.path,
5923                                                     sim->max_dev_openings);
5924                                 device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
5925                                 device->tag_delay_count = 0;
5926                         }
5927                 }
5928         }
5929
5930         if (async_update == FALSE) {
5931                 /*
5932                  * If we are currently performing tagged transactions to
5933                  * this device and want to change its negotiation parameters,
5934                  * go non-tagged for a bit to give the controller a chance to
5935                  * negotiate unhampered by tag messages.
5936                  */
5937                 if ((device->inq_flags & SID_CmdQue) != 0
5938                  && (cts->flags & (CCB_TRANS_SYNC_RATE_VALID|
5939                                    CCB_TRANS_SYNC_OFFSET_VALID|
5940                                    CCB_TRANS_BUS_WIDTH_VALID)) != 0)
5941                         xpt_toggle_tags(cts->ccb_h.path);
5942
5943                 (*(sim->sim_action))(sim, (union ccb *)cts);
5944         }
5945
5946         if (qfrozen) {
5947                 struct ccb_relsim crs;
5948
5949                 xpt_setup_ccb(&crs.ccb_h, cts->ccb_h.path,
5950                               /*priority*/1);
5951                 crs.ccb_h.func_code = XPT_REL_SIMQ;
5952                 crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
5953                 crs.openings
5954                     = crs.release_timeout
5955                     = crs.qfrozen_cnt
5956                     = 0;
5957                 xpt_action((union ccb *)&crs);
5958         }
5959 }
5960
5961 static void
5962 xpt_toggle_tags(struct cam_path *path)
5963 {
5964         struct cam_ed *dev;
5965
5966         /*
5967          * Give controllers a chance to renegotiate
5968          * before starting tag operations.  We
5969          * "toggle" tagged queuing off then on
5970          * which causes the tag enable command delay
5971          * counter to come into effect.
5972          */
5973         dev = path->device;
5974         if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
5975          || ((dev->inq_flags & SID_CmdQue) != 0
5976           && (dev->inq_flags & (SID_Sync|SID_WBus16|SID_WBus32)) != 0)) {
5977                 struct ccb_trans_settings cts;
5978
5979                 xpt_setup_ccb(&cts.ccb_h, path, 1);
5980                 cts.flags = 0;
5981                 cts.valid = CCB_TRANS_TQ_VALID;
5982                 xpt_set_transfer_settings(&cts, path->device,
5983                                           /*async_update*/TRUE);
5984                 cts.flags = CCB_TRANS_TAG_ENB;
5985                 xpt_set_transfer_settings(&cts, path->device,
5986                                           /*async_update*/TRUE);
5987         }
5988 }
5989
5990 static void
5991 xpt_start_tags(struct cam_path *path)
5992 {
5993         struct ccb_relsim crs;
5994         struct cam_ed *device;
5995         struct cam_sim *sim;
5996         int    newopenings;
5997
5998         device = path->device;
5999         sim = path->bus->sim;
6000         device->flags &= ~CAM_DEV_TAG_AFTER_COUNT;
6001         xpt_freeze_devq(path, /*count*/1);
6002         device->inq_flags |= SID_CmdQue;
6003         newopenings = min(device->quirk->maxtags, sim->max_tagged_dev_openings);
6004         xpt_dev_ccbq_resize(path, newopenings);
6005         xpt_setup_ccb(&crs.ccb_h, path, /*priority*/1);
6006         crs.ccb_h.func_code = XPT_REL_SIMQ;
6007         crs.release_flags = RELSIM_RELEASE_AFTER_QEMPTY;
6008         crs.openings
6009             = crs.release_timeout
6010             = crs.qfrozen_cnt
6011             = 0;
6012         xpt_action((union ccb *)&crs);
6013 }
6014
6015 static int busses_to_config;
6016 static int busses_to_reset;
6017
6018 static int
6019 xptconfigbuscountfunc(struct cam_eb *bus, void *arg)
6020 {
6021         if (bus->path_id != CAM_XPT_PATH_ID) {
6022                 struct cam_path path;
6023                 struct ccb_pathinq cpi;
6024                 int can_negotiate;
6025
6026                 busses_to_config++;
6027                 xpt_compile_path(&path, NULL, bus->path_id,
6028                                  CAM_TARGET_WILDCARD, CAM_LUN_WILDCARD);
6029                 xpt_setup_ccb(&cpi.ccb_h, &path, /*priority*/1);
6030                 cpi.ccb_h.func_code = XPT_PATH_INQ;
6031                 xpt_action((union ccb *)&cpi);
6032                 can_negotiate = cpi.hba_inquiry;
6033                 can_negotiate &= (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE);
6034                 if ((cpi.hba_misc & PIM_NOBUSRESET) == 0
6035                  && can_negotiate)
6036                         busses_to_reset++;
6037                 xpt_release_path(&path);
6038         }
6039
6040         return(1);
6041 }
6042
6043 static int
6044 xptconfigfunc(struct cam_eb *bus, void *arg)
6045 {
6046         struct  cam_path *path;
6047         union   ccb *work_ccb;
6048
6049         if (bus->path_id != CAM_XPT_PATH_ID) {
6050                 cam_status status;
6051                 int can_negotiate;
6052
6053                 work_ccb = xpt_alloc_ccb();
6054                 if ((status = xpt_create_path(&path, xpt_periph, bus->path_id,
6055                                               CAM_TARGET_WILDCARD,
6056                                               CAM_LUN_WILDCARD)) !=CAM_REQ_CMP){
6057                         printf("xptconfigfunc: xpt_create_path failed with "
6058                                "status %#x for bus %d\n", status, bus->path_id);
6059                         printf("xptconfigfunc: halting bus configuration\n");
6060                         xpt_free_ccb(work_ccb);
6061                         busses_to_config--;
6062                         xpt_finishconfig(xpt_periph, NULL);
6063                         return(0);
6064                 }
6065                 xpt_setup_ccb(&work_ccb->ccb_h, path, /*priority*/1);
6066                 work_ccb->ccb_h.func_code = XPT_PATH_INQ;
6067                 xpt_action(work_ccb);
6068                 if (work_ccb->ccb_h.status != CAM_REQ_CMP) {
6069                         printf("xptconfigfunc: CPI failed on bus %d "
6070                                "with status %d\n", bus->path_id,
6071                                work_ccb->ccb_h.status);
6072                         xpt_finishconfig(xpt_periph, work_ccb);
6073                         return(1);
6074                 }
6075
6076                 can_negotiate = work_ccb->cpi.hba_inquiry;
6077                 can_negotiate &= (PI_WIDE_32|PI_WIDE_16|PI_SDTR_ABLE);
6078                 if ((work_ccb->cpi.hba_misc & PIM_NOBUSRESET) == 0
6079                  && (can_negotiate != 0)) {
6080                         xpt_setup_ccb(&work_ccb->ccb_h, path, /*priority*/1);
6081                         work_ccb->ccb_h.func_code = XPT_RESET_BUS;
6082                         work_ccb->ccb_h.cbfcnp = NULL;
6083                         CAM_DEBUG(path, CAM_DEBUG_SUBTRACE,
6084                                   ("Resetting Bus\n"));
6085                         xpt_action(work_ccb);
6086                         xpt_finishconfig(xpt_periph, work_ccb);
6087                 } else {
6088                         /* Act as though we performed a successful BUS RESET */
6089                         work_ccb->ccb_h.func_code = XPT_RESET_BUS;
6090                         xpt_finishconfig(xpt_periph, work_ccb);
6091                 }
6092         }
6093
6094         return(1);
6095 }
6096
6097 static void
6098 xpt_config(void *arg)
6099 {
6100         /* Now that interrupts are enabled, go find our devices */
6101
6102 #ifdef CAMDEBUG
6103         /* Setup debugging flags and path */
6104 #ifdef CAM_DEBUG_FLAGS
6105         cam_dflags = CAM_DEBUG_FLAGS;
6106 #else /* !CAM_DEBUG_FLAGS */
6107         cam_dflags = CAM_DEBUG_NONE;
6108 #endif /* CAM_DEBUG_FLAGS */
6109 #ifdef CAM_DEBUG_BUS
6110         if (cam_dflags != CAM_DEBUG_NONE) {
6111                 if (xpt_create_path(&cam_dpath, xpt_periph,
6112                                     CAM_DEBUG_BUS, CAM_DEBUG_TARGET,
6113                                     CAM_DEBUG_LUN) != CAM_REQ_CMP) {
6114                         printf("xpt_config: xpt_create_path() failed for debug"
6115                                " target %d:%d:%d, debugging disabled\n",
6116                                CAM_DEBUG_BUS, CAM_DEBUG_TARGET, CAM_DEBUG_LUN);
6117                         cam_dflags = CAM_DEBUG_NONE;
6118                 }
6119         } else
6120                 cam_dpath = NULL;
6121 #else /* !CAM_DEBUG_BUS */
6122         cam_dpath = NULL;
6123 #endif /* CAM_DEBUG_BUS */
6124 #endif /* CAMDEBUG */
6125
6126         /*
6127          * Scan all installed busses.
6128          */
6129         xpt_for_all_busses(xptconfigbuscountfunc, NULL);
6130
6131         if (busses_to_config == 0) {
6132                 /* Call manually because we don't have any busses */
6133                 xpt_finishconfig(xpt_periph, NULL);
6134         } else  {
6135                 if (busses_to_reset > 0 && SCSI_DELAY >= 2000) {
6136                         printf("Waiting %d seconds for SCSI "
6137                                "devices to settle\n", SCSI_DELAY/1000);
6138                 }
6139                 xpt_for_all_busses(xptconfigfunc, NULL);
6140         }
6141 }
6142
6143 /*
6144  * If the given device only has one peripheral attached to it, and if that
6145  * peripheral is the passthrough driver, announce it.  This insures that the
6146  * user sees some sort of announcement for every peripheral in their system.
6147  */
6148 static int
6149 xptpassannouncefunc(struct cam_ed *device, void *arg)
6150 {
6151         struct cam_periph *periph;
6152         int i;
6153
6154         for (periph = SLIST_FIRST(&device->periphs), i = 0; periph != NULL;
6155              periph = SLIST_NEXT(periph, periph_links), i++);
6156
6157         periph = SLIST_FIRST(&device->periphs);
6158         if ((i == 1)
6159          && (strncmp(periph->periph_name, "pass", 4) == 0))
6160                 xpt_announce_periph(periph, NULL);
6161
6162         return(1);
6163 }
6164
6165 static void
6166 xpt_finishconfig(struct cam_periph *periph, union ccb *done_ccb)
6167 {
6168         struct  periph_driver **p_drv;
6169
6170         if (done_ccb != NULL) {
6171                 CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_TRACE,
6172                           ("xpt_finishconfig\n"));
6173                 switch(done_ccb->ccb_h.func_code) {
6174                 case XPT_RESET_BUS:
6175                         if (done_ccb->ccb_h.status == CAM_REQ_CMP) {
6176                                 done_ccb->ccb_h.func_code = XPT_SCAN_BUS;
6177                                 done_ccb->ccb_h.cbfcnp = xpt_finishconfig;
6178                                 xpt_action(done_ccb);
6179                                 return;
6180                         }
6181                         /* FALLTHROUGH */
6182                 case XPT_SCAN_BUS:
6183                 default:
6184                         xpt_free_path(done_ccb->ccb_h.path);
6185                         busses_to_config--;
6186                         break;
6187                 }
6188         }
6189
6190         if (busses_to_config == 0) {
6191                 /* Register all the peripheral drivers */
6192                 /* XXX This will have to change when we have loadable modules */
6193                 SET_FOREACH(p_drv, periphdriver_set) {
6194                         (*p_drv)->init();
6195                 }
6196
6197                 /*
6198                  * Check for devices with no "standard" peripheral driver
6199                  * attached.  For any devices like that, announce the
6200                  * passthrough driver so the user will see something.
6201                  */
6202                 xpt_for_all_devices(xptpassannouncefunc, NULL);
6203
6204                 /* Release our hook so that the boot can continue. */
6205                 config_intrhook_disestablish(xpt_config_hook);
6206                 free(xpt_config_hook, M_TEMP);
6207                 xpt_config_hook = NULL;
6208         }
6209         if (done_ccb != NULL)
6210                 xpt_free_ccb(done_ccb);
6211 }
6212
6213 static void
6214 xptaction(struct cam_sim *sim, union ccb *work_ccb)
6215 {
6216         CAM_DEBUG(work_ccb->ccb_h.path, CAM_DEBUG_TRACE, ("xptaction\n"));
6217
6218         switch (work_ccb->ccb_h.func_code) {
6219         /* Common cases first */
6220         case XPT_PATH_INQ:              /* Path routing inquiry */
6221         {
6222                 struct ccb_pathinq *cpi;
6223
6224                 cpi = &work_ccb->cpi;
6225                 cpi->version_num = 1; /* XXX??? */
6226                 cpi->hba_inquiry = 0;
6227                 cpi->target_sprt = 0;
6228                 cpi->hba_misc = 0;
6229                 cpi->hba_eng_cnt = 0;
6230                 cpi->max_target = 0;
6231                 cpi->max_lun = 0;
6232                 cpi->initiator_id = 0;
6233                 strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
6234                 strncpy(cpi->hba_vid, "", HBA_IDLEN);
6235                 strncpy(cpi->dev_name, sim->sim_name, DEV_IDLEN);
6236                 cpi->unit_number = sim->unit_number;
6237                 cpi->bus_id = sim->bus_id;
6238                 cpi->base_transfer_speed = 0;
6239                 cpi->ccb_h.status = CAM_REQ_CMP;
6240                 xpt_done(work_ccb);
6241                 break;
6242         }
6243         default:
6244                 work_ccb->ccb_h.status = CAM_REQ_INVALID;
6245                 xpt_done(work_ccb);
6246                 break;
6247         }
6248 }
6249
6250 /*
6251  * The xpt as a "controller" has no interrupt sources, so polling
6252  * is a no-op.
6253  */
6254 static void
6255 xptpoll(struct cam_sim *sim)
6256 {
6257 }
6258
6259 /*
6260  * Should only be called by the machine interrupt dispatch routines,
6261  * so put these prototypes here instead of in the header.
6262  */
6263
6264 static void
6265 swi_camnet(void *arg)
6266 {
6267         camisr(&cam_netq);
6268 }
6269
6270 static void
6271 swi_cambio(void *arg)
6272 {
6273         camisr(&cam_bioq);
6274 }
6275
6276 static void
6277 camisr(cam_isrq_t *queue)
6278 {
6279         int     s;
6280         struct  ccb_hdr *ccb_h;
6281
6282         s = splcam();
6283         while ((ccb_h = TAILQ_FIRST(queue)) != NULL) {
6284                 int     runq;
6285
6286                 TAILQ_REMOVE(queue, ccb_h, sim_links.tqe);
6287                 ccb_h->pinfo.index = CAM_UNQUEUED_INDEX;
6288                 splx(s);
6289
6290                 CAM_DEBUG(ccb_h->path, CAM_DEBUG_TRACE,
6291                           ("camisr\n"));
6292
6293                 runq = FALSE;
6294
6295                 if (ccb_h->flags & CAM_HIGH_POWER) {
6296                         struct highpowerlist    *hphead;
6297                         struct cam_ed           *device;
6298                         union ccb               *send_ccb;
6299
6300                         hphead = &highpowerq;
6301
6302                         send_ccb = (union ccb *)STAILQ_FIRST(hphead);
6303
6304                         /*
6305                          * Increment the count since this command is done.
6306                          */
6307                         num_highpower++;
6308
6309                         /*
6310                          * Any high powered commands queued up?
6311                          */
6312                         if (send_ccb != NULL) {
6313                                 device = send_ccb->ccb_h.path->device;
6314
6315                                 STAILQ_REMOVE_HEAD(hphead, xpt_links.stqe);
6316
6317                                 xpt_release_devq(send_ccb->ccb_h.path,
6318                                                  /*count*/1, /*runqueue*/TRUE);
6319                         }
6320                 }
6321                 if ((ccb_h->func_code & XPT_FC_USER_CCB) == 0) {
6322                         struct cam_ed *dev;
6323
6324                         dev = ccb_h->path->device;
6325
6326                         s = splcam();
6327                         cam_ccbq_ccb_done(&dev->ccbq, (union ccb *)ccb_h);
6328
6329                         ccb_h->path->bus->sim->devq->send_active--;
6330                         ccb_h->path->bus->sim->devq->send_openings++;
6331                         splx(s);
6332
6333                         if ((dev->flags & CAM_DEV_REL_ON_COMPLETE) != 0
6334                          || ((dev->flags & CAM_DEV_REL_ON_QUEUE_EMPTY) != 0
6335                           && (dev->ccbq.dev_active == 0))) {
6336
6337                                 xpt_release_devq(ccb_h->path, /*count*/1,
6338                                                  /*run_queue*/TRUE);
6339                         }
6340
6341                         if ((dev->flags & CAM_DEV_TAG_AFTER_COUNT) != 0
6342                          && (--dev->tag_delay_count == 0))
6343                                 xpt_start_tags(ccb_h->path);
6344
6345                         if ((dev->ccbq.queue.entries > 0)
6346                          && (dev->qfrozen_cnt == 0)
6347                          && (device_is_send_queued(dev) == 0)) {
6348                                 runq = xpt_schedule_dev_sendq(ccb_h->path->bus,
6349                                                               dev);
6350                         }
6351                 }
6352
6353                 if (ccb_h->status & CAM_RELEASE_SIMQ) {
6354                         xpt_release_simq(ccb_h->path->bus->sim,
6355                                          /*run_queue*/TRUE);
6356                         ccb_h->status &= ~CAM_RELEASE_SIMQ;
6357                         runq = FALSE;
6358                 }
6359
6360                 if ((ccb_h->flags & CAM_DEV_QFRZDIS)
6361                  && (ccb_h->status & CAM_DEV_QFRZN)) {
6362                         xpt_release_devq(ccb_h->path, /*count*/1,
6363                                          /*run_queue*/TRUE);
6364                         ccb_h->status &= ~CAM_DEV_QFRZN;
6365                 } else if (runq) {
6366                         xpt_run_dev_sendq(ccb_h->path->bus);
6367                 }
6368
6369                 /* Call the peripheral driver's callback */
6370                 (*ccb_h->cbfcnp)(ccb_h->path->periph, (union ccb *)ccb_h);
6371
6372                 /* Raise IPL for while test */
6373                 s = splcam();
6374         }
6375         splx(s);
6376 }